Ahemm
Europe was coming out of the Dark Ages, and things were looking up. There was an increasing population and a shortage of resources was beginning to happen. Europe turned outwards and realized that wealth awated them elsewhere. Gold and spices lured them. Countries did not want to be the last to acquire wealth and resources. That way would lead to ruin. So, the Dutch, French, English, Spanish and others competed with each other for booty and territory. BTW, so you dont look silly, it had nothing to do with religion. Dont try to make it out to be. Once colonies were established THEN the Catholic Church set up missions, but that was result, not cause.