Idea groups

Version: M&T 2.50

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	-15% Reduce inflation cost
Mercenary Hiring	-10% Mercenary maintenance
State Organization	-20% State maintenance
Martial Administration Unlocks: Expansion Part of unlocking: Global Empire	-5% Land maintenance modifier
Fortification Maintenance	-10% Fort maintenance
Naval Administration	-5% Naval maintenance modifier
Stable Prices	+0.02 Yearly inflation reduction
Bonus	-0.05 Yearly corruption

Asceticism

	Requirements: Catholic, Coptic, Orthodox, Gnostic, Hinduism Vajrayana, Mahayana, Buddhism or Jain
Charitable Work	-20% Stability increase interval
Interfaith Dialogue	+1 Tolerance of heretics
Religious Settlements	-10% Construction cost +0.4 Prestige per development from missionary
Monastic Diversity	-1 National unrest +1 Missionaries
Missionary Work	+1% Missionary strength +2% Missionary strength vs heretics
Devotion	+1 Tolerance of the true Faith
Fraternities	+20% Production efficiency
Bonus	+1 Diplomatic reputation +5% Rural goods produced modifier

Bureaucracy

	Requirements: None
Collaboration	-20% Construction time -10% State maintenance
Adaptability	+10% Administrative efficiency
Citizen Service	-10% Core-creation cost
Ethics Unlocks: Empire	-0.05 Yearly corruption
Civil Service	-20% Envoy travel time +2 Number of states
Integration	+1 Max promoted cultures
Centralization	+10 Maximum centralization
Bonus	-0.10 Monthly autonomy change

Economic

	Requirements: None
Trade Councils	+10% Trade efficiency +25% Trade range
Tax Agency	+10% National tax modifier
Secure Trade Routes Unlocks: Engineering	-5% Construction cost +10% Provincial trade power modifier
Real Economy	-15% Reduce inflation cost
Production Rights	+10% Urban production power +10% Urban production skill +10% Rural goods produced modifier
National Bank	-1 Interest per annum
Smithian Economy	+20% Production efficiency
Bonus	+0.02 Yearly inflation reduction

Empire

	Requirements (one of the following two options): 1) Ethics 2) Noble Resilience and Influential Diplomats
Punish the Rebel	-5% Harsh treatment cost
Greatness	+0.2 Yearly prestige +0.2 Yearly horde unity/legitimacy/republican tradition
Imperial Governors	-0.05 Monthly autonomy change
Magistrate	+10% Administrative efficiency
Bureau of the Interior	+2 Number of states
Ministry of War	-5% Aggressive expansion impact -5% Province war score cost
I Am the Emperor!	+15% Claim duration +10% Maximum centralization
Bonus	+5% Income from vassals +25% Vassal force limit contribution

Engineering

	Requirements: Secure Trade Routes
Organized Construction	-30% Construction time
Improved Gunpowder	+15% Artillery damage from back row
Naval Construction	+5% Ship durability
Multi-Role Artillery	+10% Siege ability
Pioneer Corps	+2.5% Settler chance
Unified Construction Plans	-20% Construction cost -5% Developed building cost
Systemized Manufactoring Methods	+15% Urban production power +15% Urban production skill
Bonus	-5% Fort maintenance +20% Fort defense

Expansion

	Requirements: Martial Administration
Local Scouts	Automatically discover adjacent when a colony is built +0.05 Yearly prestige
Colonists	+2 Colonists
Private Colony Charters	+2.5% Settler chance
Faster Colonists Part of unlocking: Global Empire	+20% Colonial range +4 Global settler increase
Intrepid Mariners	+5% Sailor recovery speed
Tough Colonists	-5% Land attrition
Bring Civilization	Can fabricate claims overseas in trade company regions
Bonus	-0.5% Prestige decay -10% Core-creation cost

Global Empire

	Requirements: Martial Administration and Faster Colonists
Exotic Goods	+5% Provincial trade power modifier
Colonial Race	+2 Colonists
Small World	+2 Number of states
National Arsenal	+30% Colonial range +5% Ship durability
Viceroys	+10% Global tariffs
Colonial Threats	Can fabricate claim overseas in trade company regions.
Promise of the New World	+5% Sailor recovery speed
Bonus	+2.5% Settler chance +5% Global settler increase

Humanist

	Requirements: None
Many Paths	-5% Idea cost
Local Traditions	-2 National unrest +5% National tax modifier
Indirect Rule	-10 Years of separatism
Cultural Ties	+1 Max Promoted Cultures
Humanist Ecumenism	+1 Tolerance of heretics
Benevolent Tolerance	+1 Max promoted cultures
Religious Relativism	+1 Tolerance of heathens
Bonus	+10% Religious unity

Innovative

	Requirements: Admin tech 20
Emancipation	-1 National unrest +5% National tax modifier
Optimism	-10% Idea cost
Abolished Serfdom	-0.5% Yearly navy tradition decay
Scientific Revolution	-10% Institution embracement cost
Formalized Officer Corps	-0.5% Yearly army tradition decay
Dynamic Court Unlocks: Representative	-10% Advisor cost +1 Available advisors
Free Subjects	+5% Rural goods produced modifier +25% Urban production skill
Bonus	-10% Technology cost

Popular Religion

	Requirements: None
Religious Art	+0.5 Prestige per development from missionary +10% Global art power
Evangelism	+1 Missionaries
Reliquaries	+0.2 Devotion +0.1 Yearly horde unity/legitimacy/republican tradition
Pilgrimage	+1 Tolerance of the true faith
Flexible Theology	+1 Tolerance of heathens
Faith healing	-2 National unrest
Messiahs	-0.01 Monthly war exhaustion
Bonus	+15% Religious unity

Prophecy

	Requirements: Not Catholic, Coptic, Orthodox, Gnostic, Jain Vajrayana, Mahayana, Buddhism or Hinduism
Grand ceremony	+0.5 Yearly prestige +0.2 Prestige per development from missionary
Prophecy	+1 Tolerance of the true faith
Divine Intercessions	+0.2 Yearly legitimacy/horde unity/devotion +0.1 Republican tradition
Holy Warriors	+5% Manpower recovery speed
Augury	+1 Leaders without upkeep +5% Morale of armies
Sacrifices	-1 National unrest +1 Missionaries
Monuments	-0.5% Prestige decay +5% Global art power
Bonus	+10% Institution spread in true faith provinces -1 Interest per annum

Scholasticism

	Requirements: Own at least 1 university
Educated Priests	+10% Institution spread in true faith provinces
Itinerant Preachers	+1 Missionaries
Religious Law	-0.05 Monthly autonomy change
Religious Advisors	+1 Diplomat
Clerical Teaching	+1 Possible advisors -5% Advisor costs
Ecceleistical Judiciary	-2 National unrest
Scriptural Tradition	+1% Missionary strength vs heretics +2% Missionary strength
Bonus	-10% Technology cost

State Religion

	Requirements: None
Mandatory Church Attendance	-10% Stability increase interval +0.1 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	0.2 Yearly devotion/horde unity 0.1 Yearly legitimacy/republican tradition
Just War	+2% Missionary strength vs heretics +3% Missionary strength
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: Monarchy, Theocracy, Theocratic order, Papal government or Noble republic
Easy Claims	-15% Cost to fabricate claims
International Nobility	+2 Diplomatic relations
Local Nobility	+0.1 Yearly devotion/legitimacy
Noble Resilience Part of unlocking: Empire	-1 National unrest
Noble Knights	+25% Cavalry flanking ability
Serfdom	-0.05 Monthly autonomy change +5 Maximum centralization
Noble Officers	+1 Leaders without upkeep +5% Administrative efficiency
Bonus	20% Vassal force limit contribution 10% Income from vassals

Culture

	Requirements: None
Luxury Tax	+5% National tax modifier
Court of Novelties	+15% Global institution spread
Patron of the Arts	+0.2 Yearly legitimacy/horde unity/devotion/republican tradition +15% Global art power
Scientific Encouragement	-10% Idea cost
Educated Ruler	-5% Technology cost
Educated Court	-10% Advisor costs +1 Possible advisors
Open Mind	-10% Institution embracement cost
Bonus	+0.1 Yearly prestige -0.5% Prestige decay

Diplomatic

	Requirements: None
Flexible Negotiations	-20% Unjustified demands
War Cabinet	-0.01 Monthly war exhaustion
Diplomatic Corps	+20% Improve relations -5% Cost to fabricate claims
Influential Diplomats Unlocks: Eminence, Influence Part of unlocking: Empire	+1 Diplomatic reputation +5% Claim duration
Foreign Embassies	+2 Diplomatic relations
Department of Foreign Affairs	+1 Diplomats
Benevolence	Lowered impact on stability from diplomatic actions -10% Diplomatic annexation cost
Bonus	-10% Province war score cost

Eminence

	Requirements: Influential Diplomats
Diplomatic Cover	-25% Covert actions relations impact
Experienced Diplomats	+1 Diplomatic reputation
Friendly Relations	+30% Improve relations -5% Core-creation cost
Imperial Ambitions	+0.15 Yearly prestige -0.5% Prestige decay
Fair Cause	-10% Aggressive expansion -10% Diplomatic annexation cost
Additional Diplomats	+1 Diplomat
Additional relations	+2 Diplomatic relations
Bonus	-10% Province war score cost

Espionage

	Requirements: None
Subtle Recruitment	-25% Covert action relation impact
Additional Loyalists Recruitment	-10% Liberty desire in subjects
Claim Fabrication	-15% Cost to fabricate claims +5% Claim duration
Agent Training	+1 Diplomat
False Flag Operation	-10% Aggressive expansion
Informants	-10% Harsh treatment cost
Counterespionage	+20% Foreign spy detection
Bonus	+20% Spy network construction +50% Rebel support efficiency

Exploration

	General Requirements: Sheltered Ports Dip tech 20 Own at least 1 port
Quest for the New World	Allows recruitment of explorers and conquistadors
Oversees Exploration	+40% Colonial Range Unlocks new world expeditions
Colonial Ventures	+2 Colonists +1.25% Settler chance
Land of Opportunity	+4 Global settler increase
Naval Expeditions	-25% Naval attrition
Exploration Navies	+10% Naval force limit modifier +5% Ship durability
Global Empire	+5% Claim duration Can fabricate claims in any colonial region belonging to another nation who are also overseas from the province, or to their colonial nations
Bonus	Can fabricate claim overseas in colonial regions

Free Trade

	Blocks: Mercantilism ideas Requirements: National Trade Policy
Aggressive Traders	+5% Ship trade power -30% Cost to justify trade conflict
Web of Trade Contracts	+5% Global trade power +30% Trade range
Exchange of Customs	+1 Diplomatic relations +5% Global institution spread
Joint Stock Companies	+10% Provincial trade power modifier +0.1 Merchant trade power
Supply Meets Demand	-0.02 Yearly inflation reduction +10% Production efficiency
Overseas Merchants	+1 Merchants
Targeted Imports	+20% Trade power abroad
Bonus	+1 Merchants +5% Trade efficiency

Influence

	Requirements: Influential Diplomats
Integrated Elites	-5% Liberty desire in subjects
Influence Beyond Our Borders	+1 Diplomats
State Propaganda	-15% Unjustified demands +10% Global art power
Marcher Lords	+25% Vassal force limit contribution
Diplomatic Influence	+1 Diplomatic relations
Tribute System	+10% Income from vassals
The Art of Influence	+5% Foreign spy detection +5% Spy network construction
Bonus	+2 Diplomatic reputation

Mercantilism

	Blocks: Free Trade ideas Requirements: National Trade Policy
Protectionism	+20% Embargo efficiency +5% Ship trade power
Trade Practice Regulations	+10% Global tariffs
Market Day	+10% Provincial trade power modifier
Subsidized Economy	+5% Rural goods produced modifier
Controlled Fairs	+20% Domestic trade power
Economic Advisor	+1 Merchants +0.2 Merchant trade power
Staple Right	+5% Global trade power +5% Trade efficiency
Bonus	-5% Institution embracement cost +1 Merchants

Merchant Marine

	Requirements: Sheltered Ports National Trade Policy Own at least 1 port
Skeleton Based Shipbuilding	-10% Shipbuilding time +25% Prestige from naval battles +10% Trade range
Convoy	+10% National sailors modifier +5% Global tariffs
Fore-and-aft Rigged Vessels	+20% Blockade efficiency +20% Embargo efficiency
Transportation Companies	+1 Merchants
Privateers	-20% Cost to justify trade conflict +30% Privateer efficiency
Experienced Navigators	+5% Global institution spread +20% Ship trade power propagation
Private Shipbuilding Incentives	+20% Ship trade power
Bonus	+1 Leaders without upkeep +1 Merchants

Plutocracy

	Blocks: Aristocratic ideas Requirements: Not a Monarchy, Theocracy, Theocratic order, Papal government or Noble republic
Free Cities	+10% Provincial trade power modifier
Competitive Merchants	+10% Global trade power
Resilient State	+0.10 Yearly republican tradition -2 National unrest
Tradition of Payment	-5% Mercenary cost
Pragmatism	+1 Leaders without upkeep +30% Trade range
Free Merchants	+1 Merchants
Popular Support	+2 Diplomatic relations
Bonus	-5% Reduce inflation cost -0.05 Yearly corruption

Representative

	Requirements: Dynamic Court Not an Absolute monarchy or Despotic monarchy Adm Tech = 20
Bill of Rights	-2 National unrest +5% Claim duration
Honour Culture	-0.1 Yearly corruption
Self Governance	-10% State maintenance +0.05 Yearly prestige
Free Assembly	-15 Years of separatism +1 Number of states
Right of Petition	+0.1 Yearly legitimacy/horde unity/devotion +0.2 Yearly republican tradition
Diversity	+1 Max promoted cultures
Representation	+1 Possible advisors -20% Stability increase interval
Bonus	+10% Provincial trade power modifier

Trade

	Requirements: None
National Trade Policy Unlocks: Free Trade, Mercantilism, Merchant Marine	+10% Trade efficiency
Shrewd Commerce Practices	+10% Global trade power
Merchant Adventures	+30% Trade range +5% Ship tradepower propagation
Free Trade	+1 Merchants
Trade Manipulation	+10% Provincial trade power modifier
Additional Merchants	+1 Merchants
Fast Negotiations	+5% Global trade power
Bonus	+1 Merchants +0.3 Merchant trade power

Military groups

Fortification

	Requirements: None
City Guards	+20% National garrison growth
Defensive Mentality	+20% Fort defense
Fortification System	-10% Fort maintenance
Homeland	+6% Recover army morale speed
Hit-and-Run Tactics	+1 Attrition for enemies
National Forts	-10% Harsh treatment cost
Temporary Fortifications	-5% Land attrition
Bonus	+5% Reinforce speed +5% Manpower recovery speed

Grand Army

	Requirements: Levy System Standardised Calibres
Organized Recruitment	-10% Recruitment time
Big Army Small Cost	-5% Land maintenance modifier
Military Enthusiasm	+5% National manpower modifier
Military Dignity	+5% Manpower recovery speed
Quick Reinforcements	+5% Reinforce speed
Swarm Tactics	+5% Land force limit modifier
Grand Army	-5% Reinforce cost
Bonus	-5% Regiment cost

Grand Fleet

	Requirements: Sheltered Ports Own at least 1 port
Grand Fleet	+20% Naval force limit modifier
Naval Standardization	-5% Naval maintenance modifier
Grand Navy	-10% Shipbuilding time -0.5% Yearly navy tradition decay
Port Recruitment	+20% National sailors modifier
Auxiliary Vessels	+30% Blockade efficiency +10% Embargo efficiency
Naval Glory	-15% Sailor maintenance
Ships Penny	-5% Ship costs
Bonus	+10% Sailor recovery speed

Leadership

	Requirements: None
Glorious Arms	+100% Prestige from land battles
Combat Maneuver	+1 Land leader maneuver
Leadership	+4% Recover army morale speed
Siege Master	+1 Land leader siege
Military Culture	-0.5% Yearly army tradition decay
Combat Leaders	+1 Land leader shock
Proud to Serve	+1 Leaders without upkeep +5% Reinforce speed
Bonus	+1 Land leader fire

Logistic

	Requirements: None
Fast Shipyards	-20% Shipbuilding time
Engineer Corps	+1 Artillery bonus vs forts
Supply Trains	+5% Reinforce speed -30% Envoy travel time
Coastal Harassment	+1 Blockade impact on siege
Regimental System	-20% Recruitment time
Improved Siege Techniques	+10% Siege ability
Improved Foraging	-5% Land attrition
Bonus	+10% Movement speed

Mercenary

	Blocks: Standing Army till mil tech 27 Requirements: None
Dogs of War	+10% Looting amount
Mercenary Levies	+50% Possible condottieri
Organised Mercenary Recruitment	+100% Available mercenaries
Organised Mercenary Payment	-5% Mercenary maintenance
Mercenary Calm	-0.01 Monthly war exhaustion
Specialized Training	+5% Mercenary discipline
Benefits for Mercenaries	+0.1 Yearly prestige +1 Leaders without upkeep
Bonus	-10% Mercenary cost

Naval

	Requirements: Own at least 1 port
Improved Shipyards	-10% Shipbuilding time
Sheltered Ports Unlocks: Naval Leadership, Naval Quality, Grand Fleet Part of unlocking: Exploration, Merchant Marine	+5% Sailor recovery speed +10% Colonial Range
Boarding Parties	+5% Morale of navies
Naval Cadets	+10% National sailors modifier +20% Naval force limit modifier
Naval Fighting Instructions	-5% Sailor maintenance
Seahawks	-0.5% Yearly navy tradition decay +100% Naval tradition from battles
Press Gangs	-5% Naval maintenance modifier
Bonus	-25% Naval attrition Ships can repair when in coastal sea zones

Naval Leadership

	Requirements: Sheltered Ports Own at least 1 port
Shanties	+1 Leaders without upkeep +4% Recover navy morale speed
Chained Cannonballs	+15% Chance to capture enemy ships +10% 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	+10% National sailors modifier +20% Global ship repair
Bonus	+1 Naval leader fire

Naval Quality

	Requirements: Sheltered Ports Own at least 1 port
Naval Wisdom	-0.5% Yearly navy tradition decay
Naval Drill	+8% Recover navy morale speed
Good Quality Wood	+30% Global ship repair
Improved Rams	+10% Galley combat ability +10% Transport combat ability
Oak Forests for Ships	-5% Ship costs
Excellent Shipwrights	+10% Ship durability
Superior Seamanship	10% Morale of navies 75% Prestige from naval battles
Bonus	+10% Heavy ship combat ability +10% Light ship combat ability

Professional Army

	Requirements: Levy System Military Drill
Sieging Troops	+5% Siege ability
Military Treaties	-5% Land attrition
Formal Military Education	-0.5% Yearly army tradition decay +25% Prestige from land battles
War Veterans	+10% Morale of armies
Military Reserve Force	-10% Recruitment time +5% Reinforce speed
Conscription Lists	+5% Manpower recovery speed
Cannon Support	+10% Artillery damage from back row
Bonus	+2.5% Discipline

Quality

	Requirements: None
War College	+1 Leaders without upkeep
Victorious Army	-0.5% Yearly army tradition decay
Military Drill Part of unlocking: Professional Army	+5% Morale of armies
Massed Battery	+10% Artillery combat ability
Our Walls Will Not Fall	+10% Fort defense
Finest of Horses	+10% Cavalry combat ability
Quality Education	+4% Recover army morale speed
Bonus	+10% Infantry combat ability

Quantity

	Requirements: None
Manufactured Uniforms	-5% Infantry cost
Enforced Service	-5% Land maintenance modifier
Military Horse Breeding	-5% Cavalry cost
Levée en Masse	+1 Possible advisors +50% Possible condottieri
Standardised Calibres Part of unlocking: Grand Army	-5% Artillery cost
Military Parades	+10% Land force limit modifier
Victory Behind Numbers	+10% Reinforce speed
Bonus	+15% National manpower modifier

Standing Army

	Blocks: Mercenary till mil tech 27 Requirements: None
Forced Conscription	+5% National manpower modifier +25% Prestige from land battles
Battlefield Commissions	+100% Army tradition from battles
Faith in Victory	-10% Recruitment time +1 Leaders without upkeep
National Enthusiasm	+10% Land force limit modifier
National Conscripts	-0.5% Yearly army tradition decay
Levy System Part of unlocking: Grand Army, Professional Army	+5% Manpower recovery speed
Expanded Supply Trains	-5% Land attrition
Bonus	+15% Reinforce speed