Excluding the role of a Parent which has the strongest social bonding pairing for increased chance of survival for the offspring/baby brought on through millions of years of evolution.
Apart from that do you think people only really care about themselves? When push comes to shove, they really only look out for their own personal interest/safety/well being. They may put on a good act but when reality hits and life gets hard, people look for a way out and an easier option.
There will always be exceptions of course, people with high levels of empathy exist and will always be around but generally speaking,
You look at say marriages, people falling in love who most would say they would die for their partner and thats likely true in a lot of cases. But when it breaks up it breaks up BIIIIIG. And they have a good chance of ending up hating each other because they were so close and fell apart/betrayed did w/e that ended it. Now they make each others lives miserable. Bit odd when they were once so close, but its almost like that person was loved while they made you happy. Once they stopped making you happy, then ttyl
Thoughts?