Combining differences often creates strength rather than weakness.
The androids' ultimate undoing is their inability to comprehend the nuances of human desire and the unpredictability of human happiness.
All of us - or, 90% of us, at any rate - are catspaws to some extent.
Time and space take little notice of our affairs.
As preposterous as the mirror universe might seem, societies all too easily normalize cruelty that would have been unimaginable only a short time before.
Our actions will come back to us, sometimes sooner than we expect (or much later, where humpback whales are concerned).
"Would it have hurt us, I wonder, just to have gathered a few laurel leaves?"
This conflict between short-term gain and long-term prosperity was a suitable theme for a 1960s America in the midst of figuring out what it wanted to be.
Our crew will continue doing what they always do: collaborating and making whatever sacrifice is necessary for the needs of the many. Shame on us if we ignore their example.
The City On the Edge of Forever holds up brilliantly more than fifty years later.