Uniqueness

There's a lot of unique things in the history of the Universe.

In one context, considering some principles of simultaneity, everything's unique, simply from the fact that each atom is different from every other.

But, in the context of this thing, and everyday life in general, similarity and uniqueness exist on a perceptual level.  There's lots of cars, and unless you have an interest, they're all pretty much the same.  You buy the kind that gets you from place to place with the least amount of pain.

Uniqueness on the other hand is something that we all admire and sort of strive for.  There's only one John Wayne.  There's only one James Bond, even though 5 different actors have played him.