The hidden curriculum is a theory which explains the often unarticulated and unresponsive things students are taught in school and which can make some impact on the learning experience of the students. Such curriculum are generally unspoken and intended teachings irrelevant to the academic programs they're practicing — things acquired from just being in school.
The imperial nations sought to expand their empires because they were called a nation without borders so the started to collect and claim as much land as possible to become #1 at the battle of who has more land