Psychologically probably not.
Homo Sapiens brain is only a few hundred thousand years old, and still has very primitive predatory drives. It's impossible for humans to live closely together without greed and envy kicking in and someone starting a war.
Our technology is advancing so rapidly that soon any schmuck who wants to will be able to release a virus into the air which could infect and then kill people, after it had replicated and spread further.
That's only one way it could happen.
Man's brain is set up for savannahs, trees, families, and clans. It's not geared to cities, supermarkets, electric lights. Within 50 years it will only take one nut to undo the entire thing.
Arf