This is an incredibly broad question, and somewhat conflicts with our Throughout History rule, as there are countless countries and thousands of years there. However, I take you to probably be alluding to more recent periods, rather than, say 12th Century Italy. As such, I would suggest resubmitting and focusing your scope more. "How has societal and legal perspectives on Homosexual activity evolved in the Western World since the mid-19th Century?" or something like that.