It's our fault in the sense that we (as a collective whole, special exceptions aside) didn't try to correct course even as the destructive and otherwise harmful effects we were perpetuating became readily obvious. My generation is definitely prideful and stubborn (again in general, special exceptions aside). However I do think it's important to acknowledge what happened to us. We are still 100% responsible for our choices, especially when we knew damn well the consequences but didn't bother to make a genuine effort to be better. It's sort of like how it's valuable to understand the nurture factor in sociopathy, yet that doesn't mean sociopaths aren't at "fault" when they so bad things (they still are).