Sexism
Perhaps they realized that
hyphenated names are a bad idea, especially after a few
generations of the practice. Hardly sexism in any case.
Racism
IIRC Star Trek was the first show to have an
interracial kiss, so critisisms on that front fall kind of flat. Besides, did any other
TV show in the 60's have that much
diversity?
Pet Overpopulation
3 unneutered tomcats on a ship with over 1000 people, (I think, feel free to correct me.) and a few puppies being born. Where do you think they come from, the
replicators?