It wasn't utopia. Earth races cooperated. Alien species cooperated. But lots of strife and human failings still. [Mudd's Women, depicting some real darker sides of human nature, was one of the first eps shot.]
That's why it was so good and why TNG seems preachy (at least at first) to some folks.
That's why it was so good and why TNG seems preachy (at least at first) to some folks.