In the EU4 game, there are many different ways to spawn colonialism. One way is to create a colony in a location that is not currently under your control. Another way is to spawn a colony in an area that is already under your control, but has been abandoned. A third way is to spawn a colony in an area that you have already conquered and are using as your own base of operations. There are also ways to spawn colonies through the use of cheat codes or mods. The best way to avoid colonialism in EU4 is to be careful where you place your colonies. If you place them too close to other countries or areas, they will be attacked by their neighbors and you will lose the colony. You should also make sure that your colonists are well-trained and equipped so that they can handle the challenges of colonizing new territory.