Sociology of an interstellar vehicle

The successful functioning of an interstellar flight is dependent on the sociology of the crew. The crew needs to be homogeneous culturally to minimise conflict. A genetically similar crew is suggested as well, in order to provide an initial gene pool for a species differentiation after the establishment of a colony around another star. The goal of interstellar flight should be to extend man or his related descendants throughout the Galaxy and eventually the Universe.