Human evolution: Ask the family 
There are different kinds of humans. Period. What makes one person unable to fathom that animals suffer? psychopathic? sarah-palin-ish? These people really are not the same type of human as I am. It is more than just environment —- it is a combination of nature and nurture. 
As recently as 40,000 years ago there were three other species of human on Earth: Neanderthals in Europe, the “hobbits” of Flores, in Indonesia, and a recently discovered and still mysterious group of creatures called the Denisovans, who lived in Central Asia. And now there is evidence that similar diversity existed earlier in human history, a little under 2m years ago, in Africa.

 Human evolution: Ask the family 

There are different kinds of humans. Period. What makes one person unable to fathom that animals suffer? psychopathic? sarah-palin-ish? These people really are not the same type of human as I am. It is more than just environment —- it is a combination of nature and nurture. 

As recently as 40,000 years ago there were three other species of human on Earth: Neanderthals in Europe, the “hobbits” of Flores, in Indonesia, and a recently discovered and still mysterious group of creatures called the Denisovans, who lived in Central Asia. And now there is evidence that similar diversity existed earlier in human history, a little under 2m years ago, in Africa.