El individuo ha luchado siempre para no ser absorbido por la tribu. Si lo intentas, a menudo estarás solo, pero ningún precio es demasiado alto por el privilegio de ser uno mismo.
... the colon separates a list. a SEMIcolon separates two independent clauses; it works a bit like that. as for a colon: only one side has to be a complete sentence.
Nostalgia doesn't mean "pain from an old wound". Νόστος = the return to your homeland. + άλγος = pain. So it literally means pain from the longing to return home, and metaphorically it means longing to return to a psychologically-fulfilling past condition/situation/state.