Intolerance in the 23rd century? Improbable! If man survives that long, he will have learned to take a delight in the essential differences between men and between cultures. He will learn that differences in ideas and attitudes are a delight, part of life’s exciting variety, not something to fear. It’s a manifestation of the greatness that God, or whatever it is, gave us. This infinite variation and delight, this is part of the optimism we built into Star Trek.