Animals don't have consciences and free will so they are the innocents. We humans haven't changed an iota. All the money, education, health and drugs don't make people better.
We are EXACTLY the same people that we were 50,000 years ago, though there are TONS MORE people on the earth (now 1.6 BILLION) and though we live longer, are healthier, eat better and are more educated than ever before in human history we are not ONE IOTA better or nicer.
I agree with your premise, but that statement is inaccurate.
50,000 years ago homo erectus was subject to the laws of natural selection. For most of the period up to & including the 19th century, that still held true.
Not so in the post-New Deal 20th Century. No natural selection. Worse, Stupid people breed. Worse even, most of them are on the left...