Diplomacy
Diplomacy in Stellaris draws on the model of previous Paradox games and offers an alternative to warmongering. It should be noted that the dialogue at the initial contact screen has no effect on opinion or further diplomacy.
Contents
Envoys[edit]
Envoys are minor Leaders and can be assigned to various diplomatic tasks. Once an Envoy is assigned to a task it cannot be reassigned again for a year. Envoys can be assigned to the following tasks:
- Improve Relations with another empire, which grants +1
Opinion per month to and from the target empire (up to +200) and removes the Relation requirement for positive diplomatic actions
- Harm Relations with another empire, which grants -1
Opinion per month to and from the target empire (up to -200) and removes the Relation requirement for negative diplomatic actions
- Assign to the Federation, which grants by +1
Cohesion per month to the Federation
- Assign to the Galactic Community, which grants +10%
Diplomatic Weight
Envoy Capacity can be modified by the following:
Diplomatic Actions[edit]
Many diplomatic actions have a 10-year cooldown once chosen. Some of these are unilateral while others need to be accepted by both sides which becomes a matter of acceptance. Most diplomatic actions require certain Relations or an envoy being sent to improve or harm Relations.
Maintaining any form of lasting treaty generates Trust, which increases
Opinion. The maximum amount of Trust obtainable is limited by the most valuable treaty between both parties. Finishing the Diplomacy tradition tree grants +50 trust cap. Trust decays if there is no new income.
Action | Effects | ![]() |
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Relations | Requirements | ![]() | |
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Improve Relations | Sends ![]() ![]() |
0 | 0 | 50 | 0 | Any | ||
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Harm Relations | Sends ![]() ![]() |
0 | 0 | 50 | 0 | Any | ||
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Declare War | Enters the Wargoals menu to declare a war | -50 | -2 | 50 | 0 | Any | No ![]() |
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Offer Trade Deal | Allows the negotiation of a one-time deal | 0 | 0 | 50 | 0 | Any | ||
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Declare Rivalry | Closes borders and grants the Animosity Casus Belli | -100 | -2 | 50 | +0.5 | Terrible Tense |
Relative Power is not Pathetic or Overwhelming Limit of Rivalries is 3, and cannot be increased |
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End Rivalry | Removes the Animosity Casus Belli | 0 | 0 | 50 | 0 | Any | At least 10 years passed since the Rivalry was declared | ![]() |
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Insult | Decaying -200 ![]() |
0 | 0 | 50 | 0 | Terrible Tense |
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Guarantee Independence | The guaranteeing empire will come to the target empire's defense if attacked. If canceled, the guarantor will have a truce towards the recipient, during which the recipient's borders will be open to the guarantor. | +10 | +0.25 | 50 | -0.5 | Neutral Positive Excellent |
Both empires are independent The independence of up to 3 empires can be guaranteed |
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Support Independence | The supporting empire will join the war against the overlord if the subject starts a war for independence. The supporting empire's power will be added to the relative power of subjects opinion modifier between the subject and the overlord. | +10 | +0.25 | 50 | 0 | Any | Target is a subject | ![]() |
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Invite to Federation / Form Federation | Invites the target empire to form a federation or join an existing one. | +50 | +1 | 100 | -2 | Excellent | ![]() Both empires at peace |
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Ask to join Federation | Requests to join an already existing Federation. | +50 | +1 | 100 | -2 | Excellent | Existing Federation and requestor both at peace | ![]() |
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Kick from Federation | Starts a vote to kick the member from the Federation | 0 | 0 | 50 | 0 | Any | Member of the same Federation, at peace | ![]() |
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Association Status | The empire and the Federation will not be able to declare war upon each other. | +10 | +0.50 | 100 | 0 | Positive Excellent |
The majority of federation members must agree to granting or removing the status but the associate member can cancel it at any time | |
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Close/Open Borders | Controls border access. The initial stance is determined by the Initial Border Status policy. | -20 | 0 | 50 | 0 | Any | No ![]() ![]() Not available between overlords and subjects |
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Ask to be their Vassal/Protectorate/Subsidiary | Turns your empire into a Vassal/Protectorate/Subsidiary. Request is only accepted by empires holding a Protective or Domineering attitude, which both require inferior relative power. | 0 | 0 | 50 | 0 | Any | Requestor and superior empire both at peace | |
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Offer Tribute | Turns your empire into a Tributary. Request is only accepted by empires holding a Protective or Domineering attitude, which both require inferior relative power. | 0 | 0 | 50 | 0 | Any | Requestor and superior empire both at peace | |
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Demand Vassal/Protectorate/Subsidiary Status | Asks the empire to become your Vassal/Protectorate/Subsidiary. Refusing grants the Subjugation Casus Belli. |
+25 | +0.25 | 50 | 0 | Any | Superior or Overwhelming Relative Power Demander and inferior empire both at peace |
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Demand Tribute | Asks the empire to become your Tributary. Refusing grants the Subjugation Casus Belli. |
+25 | +0.25 | 50 | 0 | Any | Superior or Overwhelming Relative Power Demander and inferior empire both at peace |
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Release Subject | Used to avoid risking wars of independence if the relative power of subjects becomes too great.![]() |
0 | 0 | 50 | 0 | Any | ||
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Integrate Subject | Integrates a Vassal or Protectorate into the overlord empire. | 0 | 0 | 50 | Variable | Any | Sufficient ![]() |
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Request to become A subject | Become a subject of an Awakened Empire. Awakened Empires holding an Imperious attitude will agree while those holding a Belligerent attitude will prefer a more aggressive subjugation. | 0 | 0 | 0 | 0 | Any | Target is an Awakened Empire Requestor (but not necessarily AE) at peace |
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Ask to leave Federation | Requests to leave the Federation. Refusing grants the Secession Casus Belli and a decaying -45 ![]() |
0 | 0 | 50 | 0 | Any | ![]() Target is the Federation president |
Agreements[edit]
Agreements are mutually-beneficial diplomatic actions that when offered by an empire the other must accept for them to take effect. Agreements can be ended at any time by either empire but will bring a temporary Opinion malus. Defensive Pacts can only be made or broken when both members are at Peace.
Acceptance[edit]
The acceptance of diplomatic agreements by computer empires is determined by multiple factors.
Personality[edit]
The most specific factor that determines an empire's acceptance rate is its AI personality.
Agreements and Ethics Attraction[edit]
Some diplomatic relationships affect the ethics attraction within an Empire. Running deals can have a great impact, based on the empire ethics of the other party - always dragging their own population towards a certain Ethic. The wrong friend can cause internal issues for an Empire.
- War:
Militarist
- Rivalry:
Militarist
- Defensive Pact, Federation, or Migration Access:
Egalitarian,
Xenophile,
Spiritualist
- Research Agreement:
Materialist
- Subject:
Spiritualist if the overlord is spiritualist too
Genocidal Diplomacy[edit]
Empires with the Fanatic Purifiers civic can only engage in diplomacy with empires of the same primary species. Sharing the civic is not necessary although if they do it grants +200
Opinion.
Empires with the Determined Exterminator civic can only engage in diplomacy with empires with
Machine Intelligence authority or the
Synthetic Evolution Ascension Perk.
Empires with the Devouring Swarm or Terravore civics cannot engage in diplomacy at all, not even with identical empires.
Favors[edit]
Favors can be traded via diplomatic trade or obtained through events and have two purposes. First, an empire can call upon Favors to add another empire's Diplomatic Weight to theirs when voting Resolutions in the Galactic Community as long as they don't already vote identically. Second, Favors increase the acceptance rate of certain diplomatic agreements or federation laws by +5 for each Favor. An empire can owe another empire up to 10 Favors.
Multiple empires can call upon Favors from the same target empire.
Attitude[edit]
Each empire will have a specific attitude towards other empires dictated by their AI personality, diplomatic interactions and the relative power of both empires.
Attitude | Trade & Pacts | Prefer peace | Other Effects | Requirements | Description |
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Neutral | ![]() |
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none | This Empire does not consider us relevant to their interests. | |
Wary | ![]() |
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none | inferior relative power and shared border | This Empire maintains a cautious attitude towards us. |
Receptive | ![]() |
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more inclined to accept diplomatic pacts | diplomatic AI personalities | This Empire is interested in closer relations with us. |
Cordial | ![]() |
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more inclined to accept diplomatic pacts | high opinion | This Empire is amenable to peaceful coexistence and trading with us. |
Friendly | ![]() |
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more inclined to accept diplomatic pacts and join a federation | high opinion and successful past diplomacy | This Empire views us as a friend and may be willing to form an alliance with us. |
Protective | ![]() |
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more inclined to accept diplomatic pacts and may ask you to become their subject | high opinion and superior relative power | This Empire believes that we are weak and need their protection. |
Unfriendly | ![]() |
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none | low opinion | This Empire views us with suspicion and mistrust. |
Rival | ![]() |
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none | rival with low opinion | This Empire views us as their rival. |
Hostile | ![]() |
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none | very low opinion | This Empire views us as their enemy. They are likely to attack us if they think they can win. |
Domineering | ![]() |
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only uses the Subjugation Casus Belli | low opinion and Subjugator AI | This Empire believes that we would make a fine vassal. |
Threatened | ![]() |
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none | high threat rating | This Empire views us as a threatening menace. |
Overlord | ![]() |
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none | overlord | This Empire is our overlord. |
Loyal | ![]() |
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none | subject with positive opinion | This subject is loyal to us. |
Disloyal | ![]() |
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considers the relative power of other subjects too | subject with negative opinion | This subject resents its subservience to us. |
Dismissive | ![]() |
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none | Fallen Empire | This Fallen Empire considers us largely beneath their notice. |
Patronizing | ![]() |
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may bestow gifts | Fallen Empire with high opinion | This Fallen Empire views us as errant children in need of their guidance. They may deign to bestow gifts of technology, resources or ships on us. |
Angry | ![]() |
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will send a demand which will grant them Casus Belli if refused | Fallen Empire with low opinion | We have angered this Fallen Empire with our actions, and they may declare war to punish us. |
Arrogant | ![]() |
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no effect | Distant Awakened Empire | This Awakened Empire views us with dismissive arrogance. |
Imperious | ![]() |
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will ask you to become their subject | Nearby Awakened Empire | This Awakened Empire views us as a future subject. They are likely to demand we surrender our independence. |
Belligerent | ![]() |
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none | Awakened Empire with low opinion | This Awakened Empire views us as a target of conquest. They are likely to attack us. |
Custodial | ![]() |
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accepts joining a Federation | Guardian Awakened Empires | This Awakened Empire believes that it needs to protect us from the crisis currently threatening the galaxy. They are likely to attempt to ally us. |
Enigmatic | ![]() |
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opinion is hidden and has no impact | Ancient Caretakers | This Fallen Empire is an ancient artificial intelligence that behaves in a strange and unpredictable manner. We do not know what to expect from it. |
Berserk | ![]() |
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attacks any empire nearby | Malfunctioning Custodians | This Awakened Empire is an ancient artificial intelligence that has gone berserk. It is likely to attack anything and anyone around it. |
References[edit]
Governance | Empire • Ethics • Government • Civics • Policies • Edicts • Leader • Factions • Population • Species rights • Economy • Technology • Traditions • Crime |
Exploration | Exploration • Map • Species • Anomaly • Events • FTL • Fallen empire • Pre-FTL species • Precursors • Spaceborne aliens |
Colonization | Colonization • Celestial body • Planetary features • Planetary management • Districts • Buildings • Ship • Starbase • Megastructures |
Diplomacy | Diplomacy • Trade • Subject empire • Federations • Galactic community • AI personalities |
Warfare | Warfare • Space warfare • Land warfare • Ship designer |
Others | Traits • Terraforming • Pop modification • Slavery • Crisis • Preset empires • AI players • Easter eggs |