What are the disadvantages of living in a society of sameness?

If everyone were the same, we could be compared to robots. No one would be able to/ want to stand out from the crowd, which would prevent advancements in things like medicine, technology, and science/art in general. No one would be special, so you could argue that nothing would make you significant. If everyone were the same, we would all live to die, because what else would there be to do.

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )

is this the question?