Long ago before civilizations emerged, humans where nothing but a social animal. They lived in caves, which was their natural habitat, just like any other animals. Slowly it all began to change. They began to get civilized. They began to architecture their habitats, which were no longer natural.
Getting civilized,in a way was getting separated from nature. As already mentioned they started to design their own habitats, instead of one provided by nature. They abandoned them because they thought it was less secure. The food provided by nature was replaced by cultivated food items. These were some of the basic needs. To build his habitats and to cultivate food he liked humans tapped the natural resource. In other words he began to exploit nature for his selfish needs.
The story that follows doesn't teaches anything different.From humans as a whole the selfishness shrank into the level of 'me'. In short it can be seen that selfishness is nature of humans. As we all know this nature has not turn out good for us and other living beings as well. There were signs right from the beginning , that it is not going to end well. But we couldn't resist our urge to fulfill our selfish needs.
We all know that selfishness is not good. Some may argue otherwise. But the truth is, the harmony that occur when we consider the whole world instead of only considering ourselves is what we need. But the world today is so busy and fast, travelling the path of selfishness. In-fact we live the era of 'selfie'. We are busy perfecting our selfies and yet never happy.