This way of looking at the world makes more sense to me.
As the number of humans increases, the more we need unity.
If we don't find it in culture (or war) we will find it with a lowest common denominator.
Think about the people next to you on the bus, train, in the grocery store, or post office.
These are your fellow citizens. What do you have in common?
Increasingly the answer is "not much" except that you both like money, food, housing and automobiles.
That is the crowd in action.