There have been so many attempts to understand the human behavior, yet it refuses to come into the grasp or to follow some universal formula. Wise men started to understand it with animals (we being one of them) and the father of Evolution , Charles Darwin, came up with the formula “The species always compete for the resources and those who the fittest among them survive and ready themselves for another competition”. He called it survival of the fittest. It is the nature’s way of weeding out the weaker among the species. This is the way all living beings have evolved over millions of years. Humans are endowed with most complex brains and sit at the top echelon of the evolution ladder. Charles Darwin assumed that improvement or the evolution is gradual process taking place continuously over millions of years.
There are flaws in this line of approach to explain the observations. Some scientists, most notably Stephan Jay Gould, have come to conclusion that evolution had not taken place at a continual regular pace but in the bursts of intense activity followed by hiatuses of considerably long periods.
Then there were people like Peter Alekseevich Kropotkin, the Russian prince who renounced his aristocracy and settled in England in a fishing village, who held the diagrammatically opposite view. He argued that human beings tend to live in cooperation and help each other. Not only human beings, he observed so many animals living in groups in the Siberian forests where the food is scarce due to extreme cold. He said that human beings are good at heart.
According to the latest theory the human behavior towards each other is guided by self aggrandization. It says that behind every human action there is a selfish motive which may be tangible or intangible. It is argued that why a person tries to save a child from fire or a person from drowning even if a stranger, is that if he or she does not do it, afterwards his or her conscience will torment and the person will get tension. So to avoid the mental stress, one tries to help the others. May sound funny. I think I am not able to put the argument across properly.