Answer: Individualistic of American Culture
Explanation:America has people who values personal rights and freedom to choose what one wants to do at anytime they want to do it; a right that allows someone to do her or his own thing.
Americans believe in having your own life and personal space , independence to choose as you please like a choice to follow any religion , to have any political
Views , to have freedom of expression and to be able to make decisions on your own .
William is expressing individualistic view of life where he is establishing his own territory without involving his parents in the process