h1. Diplomacy * Agreements: trade, war, science, others. ** Tariff limits ** Sanctions: trade limits on others ** War alliance: defense, war, splitting gains, self-reporting ** Cross-learning, with possible limitations ** Sharing machinery with maintenance dependant ** Lend-lease * Easily tracked, possible to violate but with repercussions * Secret deals that later can be made public ** Might include a verifiable signature * Migration ** Economical, war, cultural migrants, tourism ** Policies towards different migrants (temporary, limited rights, castration, purge) ** Special zones with special rules * Cultures' relations to each other and their governments ** Short and long-term relations which affect each other