(about selfishness in general)
IMO this country/world has changed quite a bit towards being much more selfish, and I sincerely believe selfishness is at the heart of all/most of our worlds people related problems. I have not looked into all world problems/issues to see if selfishness is at the heart of it but I wonder if it is at the heart of all of them.
While I agree that selfishness (whether individual or group) has contributed to suffering, I disagree that the general levels of selfishness have increased. It seems to me that you are experiencing the nostalgia effect.