Conquering a world is actually a great opportunity to make a choice for your society. After the world is conquered, what to do with the population? How will that choice affect relations with other races? How does the disposition of THAT race affect the choices you could make? My thoughts:
CHOICES
Integrate (Benevolent): The conquered population is now part of your citizenry, and free to travel amongst your colonies and bring their culture with them. Each planet will gain racial bonuses, based on percentage of populations. Over time, and based on distance from source planet, population percentages will change and adjust bonuses. Source planet will never fall below 60%, and nearer planets will develop larger populations up to 40%, with some planets being far enough away that they never really gain population from that planet.
Upside: Racial bonuses will now integrate into some of your planets.
Downside: Your own racial bonuses will degrade on affected planets. Potential for uprisings increases (more on that later)
Isolate (Pragmatic): The conquered population will be allowed to maintain their culture, but are restricted from interacting with the rest of your empire.
Upside: Racial bonuses remain intact on conquered worlds
Downside: Racial bonuses do not extend to other worlds, rebellion could be more likely (more on that later)
Enslave (Malevolent): The conquered population can be used as slave labor, transportable to other worlds in your empire. Slave populations provide a bonus of 10% productivity over their race norm, and only cost 50% of food. Robotic populations provide 20% productivity over their race norm, and require no food. Your own population will not colonize this planet above 10%.
Upside: Cheap, productive labor to enhance colonies.
Downside: Slaves provide 0% approval to a planets population.
Eliminate (Special): The conquered species either provides no benefit to the galaxy, or may present an existential threat to the galaxy, they must be eliminated.
The effect of this choice depends on the alignment of the race in question:
*Benevolent Race: Permanent diplomatic penalty with all benevolent races. Temporary gain or loss with pragmatic races depending on their relations with that race. Temporary diplomatic bonus with Malevolent races
*Pragmatic Race: Temporary diplomatic penalties or bonuses with other races dependent on their relations with that race.
*Malevolent race: Temporary diplomatic bonus with benevolent races. Temporary bonus or penalty with pragmatic depending on their relations with race. Permanent Diplomatic penalty or bonus with Malevolent races depending on their relations with that race.
APPROVAL:
This is probably already integrated into Crusade in some form, but planetary approval gets affected by racial presence. A large population of a race you are at war with could create an uprising in it's own right, with rebel units generated based on the size of that population.
Rebellions are generally not unanimous, so the breakout of a rebellion would also generate loyal partisans to combat rebel partisans. Overall planetary approval would affect who makes more units faster from the population.
So, an isolated planet that is entirely made up of 1 race will basically have approval ratings fairly similar to your overall relations with that race. Wars will be seen as opportunities to declare independence.
Herein also lies the danger of integration: If a full-fledged rebellion breaks out amongst an entire race, then even planets with only 10% of that population would still see partisan rebels created.
After putting down a rebellion, the choice would be presented once again for what to do with the remaining population. So, you could try integrating over and over with a certain world, and they just end up being a headache. So, you just decide to eliminate that race from your empire.
EXPANSION:
Colony ships and legions built on worlds would be populated based on the makeup of that world.
What does everybody think?
