Individualism is edgy enlightenment bollocks, end of thread.
Really though, individualism in europe and america is only around because of the de-emphasis of the family unit during the rise of capitalism. Ironically the first people to become part of the industrial revolution in many places were unmarried women, because their identities were otherwise shaped entirely around their family and they had no economic freedom. Then you have the rise of advertising which achieves the same thing, emphasising people as individuals because material desires are individualistic rather than collective. I reckon a lot of the "special snowflake" culture has its origins there.
Even nowadays in western society, individualism isn't the norm for a lot of people. It depends how much you distance yourself from your parents (and how much that is even possible). A lot of people move hundreds of miles away from their parents when they get a new house, but where that isn't possible, people who still rely on their parents (or vice versa) for monetary or social support will tend to behave more like a collective than a bunch of individuals. It all depends on circumstance, from what I can tell, and someone who grows up in a confucian collectivist hellhole like singapore is just as likely to become an enlightened, euphoric, self-defined person if they don't have family or friendship ties.
On a larger level, stuff like nationalism and racism (the actual definition of racism, i.e. defining people by race) is the "bigger picture" many people see themselves as part of. And those exist almost everywhere.