What Happen to Human Beings and Their Thinking

What Happen to Human Beings and their thinking. The nature of a human being should be loving, caring, and kind. The behavior of an animal is selfish, no respect, and don't care attitude, because they don't have the same nature as a human being. We rule over the beast of the field, the fowl of the air, and creatures of the sea. Without training and lessons human will act as if they are animals. What can be done to fix the animal nature in human being?