Which "traditional" family are you talking about? Before the Industrial Revolution and the resulting urbanization of population, most people lived in extended families, with multiple generations all under one roof. The dad, mom and kids "nuclear family" is a very recent and largely First World phenomenon.
Welfare. Especially in the black family. The stats prove it, just look at the numbers for illegitimate black children today vs. 1960. The real question is, did the Donks do this on purpose to ensure the black vote? (They get 90%). Or was it good intentions gone wrong?
Acceptance, understanding, technology, and the slow fall of dogmatic tendencies. Ya so basically computers gave us a better view into life outside our cardboard cookie-cutter homes and freed our minds man lol.
Pride, too many people do not understand the positive side of disagreement. It's supposed to clear things up. But people are so full of themselves and think they are so smart that when someone disagrees with them, they should be cast aside for stupidity and insolence.