"Among humans we've had our own cannibals, so let's not pretend that humans are any better on that count. There are many religious humans who have ritualized cannibalism every Sunday (eating of flesh and drinking of blood). It's a holy thing to humans traditionally and even now."
You're a hoot! Yeah us Christians live for Sundays so we can get our weekly dose of man flesh and blood. It's quite refreshing you know. You should try it sometime.
There are modern day real consumers of flesh and blood though. And they do it for their own religious purposes. Some though, cannibalize because there's something seriously wrong with their brains. I never want to meet up with one of those.
Nor would I want to be a family member of a tribe that eats their dead. Yikes!
" Survival of one's life and family requires self-centerism. Survival of the species often requires self-sacrifice for the rest of the species."
Survival is hard wired into every living thing as far as I know.
Here are two definitions of the words self centered; "Engrossed in oneself and one's own affairs;" and "concerned solely or chiefly with one's own interests, welfare, etc.". Humans have the ability to step outside of being "self centered" to actively help other humans or animals or plants. They don't always do this but they can.
One thing comes to mind when I think about this notion of survival and self centeredness in animals. Take, for instance, some herd animals standing out in the savannah of Africa. A mix of Zebra, Wildebeest, gazelles, etc. Along comes a predator. Let's say a Lioness. Now that gal is looking to make a meal of one of those herd animals and they know it. Every last one of the herd animals that knows the Lioness is there fears for it's own safety. That is a survival mode.
It is also a self centered mode considering the words of the definitions I posted. They are concerned with their own welfare. They probably aren't thinking about how old Zed Zebra is probably gonna get it because he is old and week. They are worried if they have been singled out to be a guest in the Lioness's belly. When the attack comes you see the herd animals run for their lives.
Ok, hang in there. I'm going to digress a bit to help my point. If say that Lioness went after a baby wildebeest it is possible that the mother will try and get the predator to stop. This to, I say, is just a survival mode. She has an investment in this baby for the survival of the species and her brain is hard wired to respond. Let me also point out that no one else tries to help her and her calf. Certainly not anyone from another species.
Now, let's examine Meerkats. They have strong "family" ties and will fight to the death for sake of home and other members of the group. They will also raid and kill adults and the offspring of rival groups. And the female leader of a group will sometimes kill the babies of a subordinate female in her own family group. All of this is done for the survival of there genetic line. Although, you don't see any Meerkats risking life and limb for any rival groups member or species.
Humans can and do go to the aid of other humans, other animals and even plants. What is their motivation for this? Does it help them to survive? Does it help their species to survive? I say, and this is my own personal take on it, that it is because of a "Devine spark". Something that God gave us so that we could do these things. That doesn't mean that everyone chooses to do so but the capacity is there. And yes there are some animals, dogs and horses come to mind, that have helped humans but that could only be that they, in a dogs case, view the human as a pack member humans. I don't know enough about equine behavior to account for them other then it possibly being another matter of family survival.
"whew" break time, lol.