Earlier quoted context omitted.
Appeal to ignorance and anti-intellectualism, congrats.
Let me put it this way: Can you really blame someone for not knowing a historical fact that is completely irrelevant to their life, especially when they probably have more pressing concerns to learn and care about? We only have so many hours in a day and so many days in a lifetime, while knowledge is practically infinite.
I limited my initial statement to educated folks, and presumably those who would like to be one.
/history/democracy/milestones -> relatively important.