Is is not our culture my friend. I's our nature. All creatures are created egocentric as part of its survival mechanism.
It requires a lot of intellect enhancement to get beyond seeing ourseveles as the center of the universe.
Most of us as children start out as me, me, mine, look at me mom. But then some of us go beyound just feeding our ego-emtions and start developing our intellect, thus escaping our egocentric, local view of the world and life. But then some of us don't of which the worst become some version of Donald Trump.