According to Buddhism, people are socially naturally classified into two groups.
1. Good People:
People are called good people because they have done good things for themselves and others. Because of those good things, they are happy, and others are also happy for this life and the next life.
2. Bad People:
People are called bad people because they have committed bad doings for themselves and others. Because of those bad doings, they suffer mentally physically and make others suffer as well in this world and the next world. These people namely kill themselves and others socially.