Ideas

As a nation develops technologically, it unlocks the ability to gain additional idea groups. Investing into a full idea group can take a long time and cost several decades worth of power. The act of choosing at any point of time a certain idea group over the other and advancing in it represent the time and focus nations choose to spend historically along certain administrative, diplomatic, and military specializations.

Early Idea groups

These ideas are added to avoid a colonial empire in classical era. Early administrative and religious cost administrative points, diplomatic and trade cost diplomatic and military and defensive cost military.

Early administrative Slavery Production efficiency: +10% Decentralization Stability cost modifier: -10% Advisors Advisor pool: +1 Resistance to foreigners Hostile core creation on us: +20% Efficient administration Core creation cost: -10% Administrative innovation Administative tech cost: -6% Noble soldiers Diplomatic upkeep: +1 Ambitions: Prestige: +20%

Early religious Early tolerance Tolerance of heathens: +1 Converting Missionaries: +1 Acceptance of differencies Tolerance of heretics: +1 Religious customs Stability cost modifier: -10% Religious education Tolerance of the true faith: +1 Divine heritage Prestige decay: -1% Organized religion Global missionary strength: +1% Ambitions: Tolerance of heathens: +1

Early diplomatic Diplomats Diplomats: +1 Additional relations Diplomatic upkeep: +1 Vassal tribute Vassal income: +10% Diplomatic reputation Diplomatic reputation: +1 Foreign customs Unjustified demands: -10% Claims Cost of fabricating claims: -15% Diplomatic conquest Diplomatic annexation cost: -10% Ambitions: Diplomatic upkeep: +1

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Early trade Trading Merchants: +1 Galley slaves Naval forcelimit: +10% Merchant admirals Navy tradition decay: -10% Naval innovation Diplomatic tech cost: -6% Merchant travels Trade range: +10% Protected trade Global trade goods size: +5% Shipwrights Global ship costs: -10% Ambitions: Trade efficiency: +10%

Early military Formation Discipline: +2.5% Professional soldiers Infantry power: +5% Military education Army tradition decay: -1% Horse breeding Cavalry power: +5% Early mercenaries Mercenary cost: -10% Military innovation Military tech cost: -6% Cheaper mercenaries Mercenary maintenance cost: -10% Ambitions: Core creation cost: -10%

Early defensive Border guard Defensiveness: +5% No aid for enemy Attrition for enemies: +1% Fight for our land Land morale: +5% History of independence Hostile core creation on us: +30% Recruitment Manpower recovery speed: +10% Slave army Global manpower: +10% Fortification Defensiveness: +5% Ambitions: Army morale recover speed: +5%

Vanilla idea groups

Those idea groups are visible as soon as you get administrative technology 50.

Administrative groups

Administrative power is required to unlock ideas within these groups.

Administrative Organized Mercenary Payments -25% Mercenary cost Adaptability -25% Core-creation cost Benefits for Mercenaries -25% Mercenary maintenance Bookkeeping -1 Interest per annum Mercenary Recruitment +25% Available mercenaries Administrative Efficiency +1 Possible advisors Civil Service -10% Administrative technology cost Bonus: +5 Number of states

Economic Bureaucracy +10% National tax modifier Organized Construction -10% Build cost National Bank +0.10 Yearly inflation reduction Debt and Loans -1 Interest per annum Centralization -0.05 Monthly autonomy change Nationalistic Enthusiasm -10% Land maintenance modifier Smithian Economics +10% Production efficiency Bonus: Development cost: −20%

Expansion Additional Colonists +1 Colonists Additional Merchants +1 Merchants Faster Colonists +10 Global settler increase Organized Recruitment -10% Recruitment time Additional Diplomats +1 Diplomatic relations Improved Shipyards -10% Shipbuilding time Competitive Merchants +20% Global trade power Bonus: -25% State maintenance Permanent Casus Belli against nations from less advanced technology groups (for Western/High American, Eastern and Anatolian)

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Humanist Tolerance +25% Religious unity Local Traditions -2 National unrest Ecumenism +3 Tolerance of heretics Indirect Rule -10 Years of separatism Cultural Ties -50% Accepted culture threshold Benevolence +30% Better relations over time Humanist Tolerance +3 Tolerance of heathens Bonus: -10% Idea cost

Innovative Patron of the Arts -1% Prestige decay Pragmatism -25% Mercenary maintenance Scientific Revolution -5% Technology cost Dynamic Court +1 Possible advisors Resilient State -10% Reduce inflation cost Optimism -0.05 Monthly war exhaustion Formalized Officer Corps +1 Leader(s) without upkeep Bonus: -25% Advisor costs

Religious Deus Vult Permanent casus belli against neighboring heathens and heretics Missionary Schools +1 Missionaries Church Attendance Duty -25% Stability cost modifier Divine Supremacy +3% Missionary strength Devoutness +1 Tolerance of the true faith +2 Yearly papal influence Religious Tradition +1 Yearly prestige Inquisition +2% Missionary strength vs heretics Bonus: -25% Culture conversion cost

Diplomatic groups

Diplomatic power is required to unlock ideas within these groups.

Diplomatic Foreign Embassies +1 Diplomats Cabinet +1 Diplomatic relations War Cabinet -33% Cost of reducing war exhaustion Benign Diplomats +25% Improve relations Experienced Diplomats +2 Diplomatic reputation Flexible Negotiations -20% Province warscore cost Diplomatic Corps -10% Diplomatic technology cost Bonus: Lowered impact on stability from diplomatic actions

Espionage Efficient Spies +50% Spy network construction -10% Advisor costs Agent Training +1 Diplomats Vetting +10% Provincial trade power modifier +33% Foreign spy detection Additional Loyalist Recruitment -10 Liberty desire in subjects Claim Fabrication -25% Cost to fabricate claims Privateers +25% Embargo efficiency Audit Checks -0.10 Yearly corruption Bonus: +50% Rebel support efficiency

Exploration Colonial Ventures +1 Colonists Quest for the New World Allows recruitment of explorers and conquistadors. Overseas Exploration +50% Colonial range Land of Opportunity +20 Global settler increase Viceroys +20% Global tariffs Free Colonies +1 Colonists Global Empire +25% Naval force limit modifier Bonus: Permanent Casus Belli against Primitives

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Influence Tribute System +25% Income from vassals Establish Cadet Branches +0.50 Yearly prestige +0.25 Chance of new heir Integrated Elites -25% Diplomatic annexation cost State Propaganda -20% Aggressive expansion impact Diplomatic Influence +2 Diplomatic reputation Postal Service +1 Diplomatic relations -25% Envoy travel time Marcher Lords +100% Vassal force limit contribution Bonus: -50% Unjustified demands

Maritime Seahawks +1 Yearly navy tradition Merchant Marine +50% National sailors modifier Sheltered Ports +20% Global ship repair Grand Navy +50% Naval force limit modifier Ship's Penny -10% Ship costs Excellent Shipwrights +2 Naval leader maneuver Naval Fighting Instruction +50% Blockade efficiency Bonus: Ships can repair when in coastal sea zones

Trade Shrewd Commerce Practice +20% Global trade power Free Trade +1 Merchants Merchant Adventures +25% Trade range National Trade Policy +10% Trade efficiency Overseas Merchants +1 Merchants Trade Manipulation +25% Trade steering Fast Negotiations +25% Caravan power Bonus: +1 Merchants

Military groups

Military power is required to unlock ideas within these groups.

Aristocratic Notes: Only available to Monarchies, Theocracies, Noble Republics, and the Papacy. Noble Knights -10% Cavalry cost +10% Cavalry combat ability Local Nobility +50% Hostile core-creation cost on us +10% Income from vassals Serfdom +25% National manpower modifier Noble Officers -1% Yearly Army Tradition decay -1% Yearly Navy Tradition decay International Nobility +1 Diplomats Noble Resilience -20% Cost of reducing war exhaustion Military Traditions -10% Military technology cost Bonus: +1 Leader(s) without upkeep

Defensive Battlefield Commissions +1 Yearly army tradition Military Drill +15% Morale of armies Improved Maneuver +1 Land leader maneuver Regimental System -10% Land maintenance modifier Defensive Mentality +20% Fort defense -10% Fort maintenance Supply Trains +33% Reinforce speed Improved Foraging -25% Land attrition Bonus: +1 Attrition for enemies

Naval Boarding Parties +1 Naval leader shock Improved Rams +25% Galley combat ability Naval Cadets +1 Naval leader fire Naval Glory +100% Prestige from naval battles Press Gangs +20% Sailor recovery speed Oak Forests for Ships +20% Heavy ship combat ability Superior Seamanship +15% Morale of navies Bonus: +10% Ship durability

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Offensive Bayonet Leaders +1 Land leader shock National Conscripts -10% Recruitment time Superior Firepower +1 Land leader fire Glorious Arms +100% Prestige from land battles Engineer Corps +20% Siege ability Grand Army +20% Land force limit modifier Esprit de Corps +5% Discipline Bonus: +5% Recover army morale speed

Plutocratic Notes: Countries without access to aristocratic ideas get plutocratic ideas instead. Tradition of Payment +25% Available mercenaries Abolished Serfdom +10% Morale of armies Bill of Rights -2 National unrest Free Merchants +1 Merchants Free Subjects +10% Goods produced modifier Free Cities +25% Caravan Power Emancipation +20% Manpower recovery speed Bonus: -5% Technology cost

Quality Private to Marshal +10% Infantry combat ability Quality Education +1 Yearly army tradition Finest of Horses +10% Cavalry combat ability Corvettes +5% Ship durability Naval Drill +10% Naval morale Copper Bottoms -25% Naval attrition Massed Battery +10% Artillery combat ability Bonus: +5% Discipline

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Quantity Levée en Masse +50% National manpower modifier The Young can Serve +20% Manpower recovery speed Enforced Service -10% Regiment cost The Old and Infirm -10% Land maintenance modifier Mercenary Contracts +25% Available mercenaries Conscripted Garrisons +25% Garrison size Expanded Supply Trains -10% Land attrition Bonus: +50% Land force limit modifier

Industrial era idea groups

You can only choose one of those and only with a tech level of 81 or higher. They have no bonus or policy. Order one costs administrative points, Freedom costs diplomatic and Autocracy cost military.

Order State controlled economy *Inflation reduction: -0.10 Global tax modifier: +15% Patriotism *Land morale: +0.10 Defensiveness: +20% State police Global unrest: -1 Workers' utopia *Production efficiency: +10% Global trade goods size: +10% Free education Administrative tech cost: -20% Military service *Global manpower: +20% Land force limit: +20% Universal healthcare Manpower recovery speed: +20% Ambitions: +1 Leader(s) without Upkeep

Freedom Capitalist economy *Merchants: +1 Global trade power: +10% Freedom of Religion *Tolerance of heathens: +2 Tolerance of heretics: +2 Universal suffrage *Female advisor chance: +40% Global unrest: -1 Freedom of speech *Yearly republican tradition: +1 Yearly legitimacy: +1 Equality of races Accepted culture treshold: -50% Volunteer army *Can recruit female generals Discipline: +5% Sharing of ideas *Idea cost: -10% Diplomatic tech cost: -20% Ambitions: +1 Possible Advisors

Autocracy Glorious leader Land morale: +0.10 Police state Global unrest: -1 Élite generals *Yearly army tradition: +0.5 Leader land fire: +1 Military industry *Global regiment recruiting speed: +10% Global regiment cost: -10% Military thinkers Military tech cost: -20% Resettlement *Culture conversion cost: -20% Core creation cost: -20% Total war *Reducing war exhaustion cost: -20% Manpower recovery speed: +20% Ambitions: +5% Discipline