Idea groups

Version: M&T 2.60.03

Number of idea groups increase by 1 at the following administrative tech levels:

• 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56

Administrative groups

Administrative

	Requirements: None
Currency Standards	+10% National tax modifier -15% Reduce inflation cost
Mercenary Hiring	-10% Mercenary maintenance +1 Possible advisors
Army Administration	-10% Land maintenance modifier +5% Administrative efficiency
Fortification Maintenance Unlocks: Empire, Expansion Part of unlocking: Global Empire	-15% Fort maintenance
Naval Administration	-15% Naval maintenance modifier
Stable Prices	+0.05 Yearly inflation reduction -0.10 Yearly corruption
State Organisation	-10% Advisor costs +10% Communication efficiency
Bonus	-20% State maintenance +2 Number of states

Asceticism

	Requirements: Catholic, Coptic, Orthodox, Gnostic, Hinduism Vajrayana, Mahayana, Buddhism or Jain
Charitable Work	-15% Stability increase interval
Interfaith Dialogue	+1 Tolerance of heretics
Religious Settlements	-10% Construction cost +0.05 Prestige per development from missionary
Monastic Diversity	-2 National unrest +1 Missionaries
Missionary Work	+1% Missionary strength +2% Missionary strength vs heretics
Devotion	+1 Tolerance of the true Faith
Fraternities	+10% Production efficiency
Bonus	+0.50 Diplomatic reputation +5% Rural goods produced modifier

Bureaucracy

	Requirements: None
Collaboration	-20% Construction time -10% State maintenance
Adaptability	+7.5% Administrative efficiency
Citizen Service	-15% Core-creation cost
Ethics Unlocks: Empire	-0.10 Yearly corruption
Civil Service	-20% Envoy travel time +2 Number of states
Integration	+1 Max promoted cultures
Centralised Control	-0.10 Monthly autonomy change +5 Maximum centralization
Bonus	-15% Advisor cost +1 Possible advisors

Economic

	Requirements: None
Trade Councils	+10% Trade efficiency +25% Trade range
Tax Agency	+10% National tax modifier
Secure Trade Routes	-10% Construction cost -5% Developed build cost
Real Economy Unlocks: Engineering	-15% Reduce inflation cost
Production Rights	+7.5% Rural goods produced modifier +10% Urban production power +10% Urban production skill
National Bank	-1 Interest per annum
Smithian Economy	+15% Production efficiency
Bonus	+0.05 Yearly inflation reduction

Empire

	Requirements: Fortification Maintenance or Ethics or Noble Resilience or Influential Diplomats
Punish the Rebel	-20% Harsh treatment cost
Greatness	+0.25 Yearly prestige +0.25 Yearly horde unity/legitimacy/republican tradition
Imperial Governors	-0.05 Monthly autonomy change -10% Diplomatic annexation cost
Magistrate	+7.5% Administrative efficiency
Bureau of the Interior	+2 Number of states
Ministry of War	-5% Aggressive expansion impact -10% Province war score cost
I Am the Emperor!	+1 Diplomatic reputation +10 Maximum centralization
Bonus	+20% Income from vassals

Engineering

	Requirements: Real Economy
Organized Construction	-30% Construction time
Improved Gunpowder	+15% Artillery damage from back row
Naval Construction	+5% Ship durability
Multi-Role Artillery	+10% Siege ability
Surveyor Corps	-25% Construction cost for canals +5% Rural goods produced modifier
Unified Construction Plans	-20% Construction cost -10% Developed building cost
Systemized Manufactoring Methods	+15% Urban production power +15% Urban production skill
Bonus	-10% Fort maintenance +20% Fort defense

Expansion

	Requirements: Fortification Maintenance or Sheltered Ports Dip tech 24 * One of the following: 1) Western technology group 2) All of the following: Capital in North America, South America or Oceania Not a subject nation Uncolonized province bordering your country Year is 1706 or later
Local Scouts	Automatically discover adjacent when a colony is built +0.50 Yearly prestige
Colonists	+2 Colonists +15% Naval force limit modifier
Private Colony Charters	+10% Settler chance -20% Core-creation cost
Faster Colonists	+33% Colonial range +25 Global settler increase
Intrepid Mariners	-10% Admiral cost +20% Sailor recovery speed
Tough Colonists	-15% Land attrition
Bring Civilization	-1% Prestige Decay +0.25 Trade company province trade value +15% Trade company province local trade power
Bonus	Can fabricate claims overseas in trade company region +2 Colonists

* If your technology group is Western, you only need Dip tech 20.

Global Empire

	Requirements: Land of Opportunity Sheltered Ports Fortification Maintenance or Free Trade Own at least one port Not a colonial nation Admin tech 24 *
Exotic Goods	+10% Provincial trade power modifier
Colonial Race	+2 Colonists +15% Sailor recovery speed
Small World	-20% Core-creation cost +3 Number of states
National Arsenal	+30% Colonial range +10% Ship durability
Viceroys	-10% Liberty desire in subjects
Colonial Threats	Can fabricate claim overseas in trade company regions. -10% Aggressive expansion impact
Promise of the New World	-10% Colonial nation construction cost +10% Colonial nation production efficiency +1 Naval leader maneuver
Bonus	+10% Settler chance +50 Global settler increase

* If your technology group is Western, you only need Admin tech 20. Non-western AI nations need Admin tech 28.

Innovative

	Requirements: Dip tech 16
Emancipation	+10% Production efficiency -0.15 Yearly corruption
Formalized Naval Corps	-1% Yearly navy tradition decay
Optimism	-10% Idea cost
Scientific Revolution Unlocks: Representative	-20% Institution embracement cost +200% Innovativeness gain
Formalized Officer Corps	-0.4% Yearly army tradition decay
Dynamic Court	-15% Advisor cost +1 Possible advisors
Free Subjects	+5% Rural goods produced modifier +25% Urban production skill
Bonus	-10% Technology cost

Popular Religion

	Requirements: None
Religious Art	+10% Global art power +2 Max promoted cultures -50% Promote culture cost
Evangelism	+1 Missionaries +0.10 Prestige per development from missionary
Reliquaries	+0.33 Yearly horde unity/legitimacy/republican tradition/devotion
Pilgrimage	-10% Stability increase interval +1 Tolerance of the true faith
Flexible Theology	+1.5 Tolerance of heathens
Faith healing	-3 National unrest
Messiahs	-0.02 Monthly war exhaustion
Bonus	+1.5 Tolerance of heretic +15% Religious unity

Prophecy

	Requirements: Not Catholic, Coptic, Orthodox, Gnostic, Jain Vajrayana, Mahayana, Buddhism or Hinduism
Grand ceremony	+0.33 Yearly prestige +0.05 Prestige per development from missionary
Prophecy	+1 Tolerance of the true faith
Divine Intercessions	+0.33 Yearly legitimacy/horde unity/devotion/republican tradition
Holy Warriors	+15% Manpower recovery speed
Augury	+1 Leaders without upkeep +5% Morale of armies
Sacrifices	-2 National unrest +1 Missionaries
Monuments	-1% Prestige decay +5% Global art power
Bonus	+20% Institution spread in true faith provinces -1 Interest per annum

Scholasticism

	Requirements: Own at least 1 university
Educated Priests	+20% Institution spread in true faith provinces
Itinerant Preachers	+1 Missionaries
Religious Law	-0.05 Monthly autonomy change
Religious Advisors	+1 Diplomat
Clerical Teaching	-15% Advisor costs +1 Possible advisors
Ecceleistical Judiciary	-2 National unrest
Scriptural Tradition	+3% Missionary strength +1% Missionary strength vs heretics
Bonus	-15% Technology cost

State Religion

	Requirements: None
Mandatory Church Attendance	-10% Stability increase interval +0.02 Prestige per development from missionary
Religious Traditions	+1 Tolerance of the true faith
Holy Orders	+5% Morale of Armies
Crusades	Grants access to religious casus belli against nearby heathens and heretics with high enough piety
Divine Right	+0.25 Yearly devotion/legitimacy/horde unity/republican tradition
Just War	+3% Missionary strength +2% Missionary strength vs heretics
Chosen People	-0.05 Monthly autonomy change
Bonus	+6% Recover army morale speed +6% Recover navy morale speed

Diplomatic groups

Aristocracy

	Blocks: Plutocratic ideas Requirements (one of the following): 1) Noble voting rights reform Don't have: Free city, City state, Trade republic, Colonial or Dictatorship reforms 2) Monarchy Government 3) Theocracy Government
Easy Claims	-15% Cost to fabricate claims
International Nobility	+1 Diplomatic reputation +2 Diplomatic relations
Local Nobility	+0.50 Yearly devotion/legitimacy
Noble Resilience Unlocks: Empire	-2 National unrest
Noble Knights	+10% Cavalry combat ability +10% Cavalry to infantry ratio
Serfdom	-0.05 Monthly autonomy change +5 Maximum centralization
Noble Officers	+1 Leaders without upkeep +5% Administrative efficiency -10% Stabilty hit severity from revoking noble privileges
Bonus	+15% Income from vassals -10% Liberty desire in subjects

Culture

	Requirements: None
Patron of the Arts	+15% Global art power +0.33 Yearly legitimacy/horde unity/devotion/republican tradition Unlocks Civil Arts Academy and Opera House buildings
Educated Court	-20% Advisor costs +2 Possible advisors
Court of Novelties	+25% Global institution spread
Scientific Encouragement	-10% Idea cost -25% Culture conversion cost
Educated Ruler	-10% Technology cost
Luxury Tax	-5% Developed build cost +10% National tax modifier
Open Mind	-25% Institution embracement cost
Bonus	+0.1 Yearly prestige -0.5% Prestige decay

Diplomatic

	Requirements: None
Flexible Negotiations	-20% Unjustified demands
War Cabinet	-0.02 Monthly war exhaustion
Diplomatic Corps	+30% Improve relations -25% Cost to fabricate claims
Influential Diplomats Unlocks: Eminence, Influence Part of unlocking: Empire	+2 Diplomatic reputation +10% Claim duration
Foreign Embassies	+2 Diplomatic relations
Department of Foreign Affairs	+1 Diplomats -20% Envoy travel time
Benevolence	Lowered impact on stability from diplomatic actions -20% Diplomatic annexation cost
Bonus	-10% Province war score cost

Eminence

	Requirements: Influential Diplomats
Friendly Relations	+30% Improve relations -10% Core-creation cost
Imperial Ambitions	+0.33 Yearly prestige -0.5% Prestige decay
Fair Cause	-10% Aggressive expansion impact -15% Diplomatic annexation cost
Additional Diplomats	+1 Diplomat
Diplomatic Cover	-25% Covert action relation impact
Experienced Diplomats	+1 Diplomatic reputation
Additional relations	+1 Diplomatic relations
Bonus	-10% Province war score cost

Espionage

	Requirements: None
Subtle Recruitment	+25% Spy network construction -25% Covert action relation impact
Additional Loyalists Recruitment	-10% Diplomatic annexation cost -10% Liberty desire in subjects -0.25% Liberty desire from subject development
Claim Fabrication	May fabricate claims for vassals -33% Cost to fabricate claims +15% Claim duration
Agent Training	+1 Diplomat -0.15 Yearly corruption +15% Siege ability
False Flag Operation	-10% Aggressive expansion impact -33% Harsh treatment cost
Informants	-2 National unrest +0.02 Yearly inflation reduction
Counterespionage	+33% Foreign spy detection
Bonus	+100% Rebel support efficiency -10% Advisor cost

Exploration

	General Requirements: Sheltered Ports Admin tech 20 * Own at least 1 port Not a colonial nation
Quest for the New World	Allows recruitment of explorers and conquistadors +1 Leaders without upkeep -25% Leader cost
Oversees Exploration	+1 Naval leader maneuver +33% Colonial Range
Colonial Ventures	+2 Colonists +5% Settler chance
Land of Opportunity Part of unlocking: Global Empire	+20 Global settler increase -15% Cost to fabricate claims
Naval Expeditions	-25% Naval attrition
Exploration Navies	+10% Naval force limit modifier
Global Empire	Can fabricate claims in any colonial region belonging to another nation who are also overseas from the province, or to their colonial nations +5% Colonial nation population growth +15% Claim duration
Bonus	Can fabricate claim overseas in colonial regions +2 Colonists

* If your technology group is Western, you only need Admin tech 16.

Free Trade

	Blocks: Mercantilism ideas Requirements: Free Trade
Aggressive Traders	-15% Light ship cost -20% Sailor maintenance
Web of Trade Contracts	+10% Global trade power +30% Trade range
Exchange of Customs	+1 Diplomatic relations +10% Global institution spread
Joint Stock Companies	-2 Interest per annum
Supply Meets Demand	+0.075 Yearly inflation reduction
Overseas Merchants	+1 Merchants +10% Trade steering
Targeted Imports	+20% Trade power abroad
Bonus	+2 Merchants +10% Trade efficiency

Humanist

	Requirements: None
Many Paths	-10% Idea cost
Local Traditions	-2 National unrest -0.05 Monthly autonomy change Unlocks Civil Arts Academy and Opera House buildings
Indirect Rule	-15% Stability increase interval -10 Years of separatism
Cultural Ties	+2 Max promoted cultures +1 Number of states
Humanist Ecumenism	+1 Tolerance of heretics
Benevolent Tolerance	-15% Advisor cost +1 Possible advisors
Religious Relativism	+1 Tolerance of heathens
Bonus	+20% Religious unity

Influence

	Requirements: Influential Diplomats
Integrated Elites	-0.05 Monthly autonomy change
State Propaganda	+10% Global art power -20% Unjustified demands
Diplomatic Influence	+2 Diplomatic relations
Influence Beyond Our Borders	+1 Diplomats -10% Aggressive expansion impact
Tribute System	+25% Income from vassals -10% Liberty desire in subjects
Marcher Lords	+20% Fort defense
The Art of Influence	+20% Foreign spy detection +20% Spy network construction -15% Subject stability increase interval -0.10 Subject yearly corruption
Bonus	+2 Diplomatic reputation

Mercantilism

	Blocks: Free Trade ideas Requirements: Free Trade
Protectionism	+1 Merchant trade power
Trade Practice Regulations	+10% Global trade power
Market Day	+25% Provincial trade power modifier
Subsidized Economy	+10% Production efficiency +5% Rural goods produced modifier
Controlled Fairs	+25% Domestic trade power
Economic Advisor	-10% Construction cost +1 Merchants
Staple Right	+15% Trade efficiency
Bonus	+2 Merchants -10% Institution embracement cost

Merchant Marine

	Requirements: Sheltered Ports Free Trade Own at least 1 port
Skeleton Based Shipbuilding	+7.5% Trade efficiency +25% Trade range
Convoy	+20% National sailors modifier -20% Shipbuilding time
Fore-and-aft Rigged Vessels	+50% Blockade efficiency +25% Embargo efficiency
Transportation Companies	+1 Merchants +10% Trade steering
Privateers	-50% Cost to justify trade conflict +33% Privateer efficiency
Experienced Navigators	+30% Global institution spread
Private Shipbuilding Incentives	-10% Light ship cost +20% Ship trade power +10% Urban production power in coastal provinces
Bonus	+1 Merchants +1 Leaders without upkeep

Plutocracy

	Blocks: Aristocratic ideas Requirements: Not a Monarchy Not a Theocracy If you have Noble Voting Rights you need one of the following reforms: Free city, City state, Trade republic, Colonial or Dictatorship reforms
Free Cities	+20% Provincial trade power modifier +10% Naval force limit modifier
Competitive Merchants	+15% Global trade power +10% Trade steering
Resilient State	-2 National unrest +0.33 Yearly republican tradition
Tradition of Payment	-25% Mercenary cost +15% Available mercenaries
Pragmatism	+30% Trade range +1 Leaders without upkeep
Free Merchants	+10% Trade efficiency +2 Merchants
Popular Support	+1 Diplomatic reputation +2 Diplomatic relations
Bonus	-0.02 Monthly war exhaustion -20% Reduce inflation cost -0.10 Yearly corruption

Representative

	Requirements: Scientific Revolution Lower than 60 centralization Admin Tech 28 * Don't have all of the following reforms together: Divine right, Delegated ruler, Hereditary elite
Bill of Rights	-2 National unrest +15% Claim duration
Honour Culture	+0.33 Yearly prestige -0.15 Yearly corruption
Self Governance	-15% State maintenance +1 Number of states
Free Assembly	-10 Years of separatism
Right of Petition	+0.33 Yearly devotion/legitimacy/horde unity/republican tradition
Diversity	+3 Max promoted cultures -25% Promote culture cost
Representation	Stops the cultural unrest events from firing -15% Stability increase interval +2 Possible advisors
Bonus	+10% Provincial trade power modifier

* If your government is a Republic, you only need Admin tech 24.

Trade

	Requirements: None Unlocks Bank building
National Trade Policy	+10% Trade efficiency
Shrewd Commerce Practices	+10% Global trade power
Merchant Adventures	+30% Trade range
Free Trade Unlocks: Free Trade, Mercantilism, Merchant Marine Part of unlocking: Global Empire	+1 Merchants
Trade Manipulation	+25% Provincial trade power modifier
Additional Merchants	+1 Merchants
Fast Negotiations	+15% Domestic trade power
Bonus	+2 Merchants -20% Light ship cost

Military groups

Fortification

	Requirements: None
Defensive Conscription	+15% National garrison growth +25% Garrison size
Defensive Mentality	+30% Fort defense
Fortification System	-30% Fort maintenance
Homeland	-0.02 Monthly war exhaustion +6% Recover army morale speed
Hit-and-Run Tactics	+1 Attrition for enemies
Army at Peace	+25% Manpower recovery speed
Temporary Fortifications	-50% Fort construction cost -25% Estates local fortifications maintenance
Bonus	-10% Construction cost +15% Siege ability

Grand Army

	Blocks: Professional Army Requirements: Levy System Military Horse Breeding
Organized Recruitment	-20% Recruitment time
Big Army, Small Cost	-10% Land maintenance modifier
Military Enthusiasm	+20% National manpower modifier +0.2% Yearly army professionalism
Military Dignity	+20% Manpower recovery speed
Quick Reinforcements	+15% Reinforce speed
Swarm Tactics	+2.5% Discipline -20% Harsh treatment cost
Regimental Honours	+20% Land force limit modifier
Bonus	-15% Land attrition +33% National supply limit modifier

Grand Fleet

	Requirements: Sheltered Ports Own at least 1 port
Grand Fleet	+25% Naval force limit modifier
Naval Standardization	-15% Naval maintenance modifier
Grand Navy	-0.5% Yearly navy tradition decay -15% Shipbuilding time
Port Recruitment	+20% National sailors modifier
Auxiliary Vessels	+50% Blockade efficiency
Naval Glory	+5% Morale of Navies -20% Sailor maintenance
Ships Penny	-15% Ship costs +10% Global ship repair
Bonus	+15% Sailor recovery speed -10% Morale hit when losing a ship

Leadership

	Requirements: None
Glorious Arms	+100% Prestige from land battles
Combat Manoeuvre	-20% Leader cost
Leadership	+6% Recover army morale speed
Siege Master	+0.50 Yearly army tradition
Combat Leaders	+5% Morale of Armies +1 Land leader shock
Military Culture	-0.5% Yearly army tradition decay
Proud to Serve	+15% Reinforce speed +2 Leaders without upkeep
Bonus	+1 Land leader fire

Logistic

	Requirements: None
Regimental System	-25% Recruitment time +25% Reduced morale damage taken by reserves
Improved Siege Techniques	+1 Leader siege +20% Siege ability
Supply Trains	+25% Reinforce speed -50% Envoy travel time
Coastal Harassment	+1 Artillery bonus vs fort +1 Blockade impact on siege
Engineer Corps	+1 Land leader maneuver +10% Movement speed
Fast Shipyards	-5% Construction cost -5% Regiment costs
Improved Foraging	-20% Land attrition +10% Land-based communication efficiency +25% National supply limit modifier -33% Road construction cost
Bonus	-10% Artillery cost +10% Artillery combat ability

Mercenary

	Blocks: Standing Army until Mil tech 16 Requirements: None
Organised Mercenary Payments	-20% Mercenary maintenance -25% Mercenary cost
Mercenary Recruitment	-15% Leader cost
Dogs of War	+15% Reinforce speed
Benefits for Mercenaries	+100% Prestige from land battles +1 Leaders without upkeep
Mercenary Calm	-0.02 Monthly war exhaustion
Specialized Training	+5% Mercenary discipline
Mercenary Levies	No army professionalism hit when recruiting mercenaries +150% Possible condottieri
Bonus	+50% Available mercenaries

Naval

	Requirements: Own at least 1 port
Improved Shipyards	-15% Shipbuilding time +20% Global ship repair
Sheltered Ports Unlocks: Naval Leadership, Naval Quality, Grand Fleet Part of unlocking: Expansion, Exploration, Global Empire, Merchant Marine	+15% Sailor recovery speed +33% Colonial Range
Boarding Parties	+7.5% Morale of navies +15% National sailors modifier +50% Privateer efficiency
Naval Cadets	+5 Naval force limit +2ß% Naval force limit modifier
Naval Fighting Instructions	+5% Trade efficiency -15% Sailor maintenance
Seahawks	-1% Yearly navy tradition decay +100% Naval tradition from battles
Press Gangs	-10% Naval maintenance modifier -75% Naval barrage cost +5% Naval-based communication efficiency
Bonus	Ships can repair when in coastal sea zones -25% Naval attrition

Naval Leadership

	Requirements: Sheltered Ports Own at least 1 port
Shanties	+1 Leaders without upkeep +5% Recover navy morale speed
Chained Cannonballs	+15% Chance to capture enemy ships +7.5% Morale of navies
Flagships	+25% Prestige from naval battles +5% Global naval engagement
Improved Charting Techniques	+1 Naval leader maneuver
Naval Culture	-0.5% Yearly navy tradition decay
Grapeshot Supported Boarding	+1 Naval leader shock
A Leader to Follow	+15% National sailors modifier -15% Shipbuilding time
Bonus	+1 Naval leader fire

Naval Quality

	Requirements: Sheltered Ports Own at least 1 port
Naval Wisdom	-1% Yearly navy tradition decay
Naval Drill	+8% Recover navy morale speed
Good Quality Wood	-15% Shipbuilding time +20% Global ship repair
Improved Rams	+15% Galley combat ability +20% Transport combat ability
Oak Forests for Ships	-10% Ship costs
Excellent Shipwrights	+20% National sailors modifier +15% Ship durability
Superior Seamanship	+15% Morale of navies +100% Prestige from naval battles
Bonus	+15% Heavy ship combat ability +15% Light ship combat ability

Professional Army

	Blocks: Grand Army Requirements: Levy System Massed Battery
Organized Lines	-5% Shock damage received
Military Treaties	-5% Land attrition
Formal Military Education	-0.4% Yearly army tradition decay +0.4% Yearly army professionalism
War Veterans	+12.5% Morale of armies
Military Reserve Force	+15% Reinforce speed
In Field Fortification	-5% Fire damage received
Cannon Support	+10% Artillery damage from back row
Bonus	+5% Discipline

Quality

	Requirements: None
Finest of Horses	+7.5% Morale of armies
War College	+1 Leaders without upkeep -10% Leader cost
Victorious Army	+0.25 Yearly army tradition -0.2% Yearly army tradition decay
Massed Battery Part of unlocking: Professional Army	+10% Siege ability
Military Drill	+4% Recover army morale speed
Our Walls Will Not Fall	+15% Fort defense
A Disciplined Army	+0.25% Discipline
Bonus	+10% Infantry combat ability +10% Cavalry combat ability

Quantity

	Requirements: None
Standardised Calibers	-20% Regiment cost
Manufactured Uniforms	+15% Manpower recovery speed
Enforced Service	-10% Land maintenance modifier -10% Recruitment time
Military Horse Breeding Part of unlocking: Grand Army	+5% Morale of armies -0.01 Monthly war exhaustion
Mass Leadership	+15% Reinforce speed -15% Reinforce cost
Military Parades	+20% Land force limit modifier
Victory Behind Numbers	-10% Estate levy maintenance modifier -20% Manpower cost for roads, forts and canals
Bonus	+25% National manpower modifier

Standing Army

	Blocks: Mercenary until Mil tech 16 Requirements: None
Battlefield Commissions	+50% Army drill gain modifier -50% Army drill decay modifier
Forced Conscription	-10% Regiment cost
Military Culture	+10% Morale of armies
Levy System Part of unlocking: Grand Army, Professional Army	+15% Manpower recovery speed
National Enthusiasm	+15% Reinforce speed
Expanded Supply Trains	-10% Land attrition +10% National supply limit modifier
National Conscripts	+20% National manpower modifier +10% Land force limit modifier
Bonus	+10% Movement speed