But, that's not what Gene Roddenberry tells us 23rd century Earth is like. According to him humans have cast aside ALL their negative qualities, even children are no longer naughty! Humans don't feel envy, jealousy, anger....etc all these things must be psychoanalyzed out of them. This is what he said..
That's much more of a TNG thing, referring to the 24th century, according to Roddenberry in his later years.
Doesn't have much to do with the 23rd-century future we saw on TOS back in the sixties, where human beings were still very human, warts and all. Heck, we never even saw 23rd century Earth on TOS, only the wild-and-woolly final frontier.