They range in philosophies from the proud warrior race of the Klingons to the stoic logical people of Vulcan.
The creators of Star Trek have concocted some truly memorable species over the years. Learning about these species and seeing how the Star Fleet crew interact with them is one of the biggest draws of the show. Much like the journeys of the protagonists themselves, Star Trek has introduced viewers to all kinds of fascinating alien species from all corners of the galaxy.