Re: In Star Trek -- Looking like humans = Being civilized?
I think you're reading too much into the artistic decisions made by makeup designers. The scripts usually were limited to describing alien characters as 'humanoid' (bipeds resembling ourselves) or 'monstrous' (Armus, Sheliak, Morn, special effects/cgi). Nearly all alien races emphasize some aspect of human nature, whether it be violence, honor, furtiveness, spiritualism, or greed for dramatic purposes.
Dr. Howard, Dr. Fine, Dr. Howard: For Duty and Humanity!
--Men in Black, 1934.