The morals of the average person haven't changed drastically in America since the 30s, with the exception of less racism, sexism, xenophobia, and homophobia. Which is a good thing.
You say people today, especially young people, are disrespectful, but on any given day I see people going about their business, saying their pleases and thankyous, and trying to not encroach on the boundaries of others. For the average person, I think they're biggest crime is being too insular and emotionally distant towards others out of fear of encroaching on boundaries, stemming either from their morals or their desire not to look foolish. Obviously, there are people who overstep coundaries and treat people poorly, but from what I see they're hardly in the majority. The vast majority of people are simply cold and self involved, their sins are of ommision and inaction, not of anything they do.
And these days, respect for a woman's sexual boundaries is more common and accepted. Respect for the rights and oppinions of other races and nationalities is more common and expected. Respect for new and different ideas about how the world works and how it should be done is more common and expected. It's far from 100%. There are still rapists and racists and close minded, condascending people, but it's not as common and certainly not as celibrated as it was in the 1930s. I think, ethically, the western world is in a better place than it was 80 years ago.
