Humans possess the ability to feel anger from the moment they take their first breath. A 4-month-old infant can express his anger. By the time a child is two years old, violent actions in the form of temper tantrums reach their peak. By the age of three, their violent behavior starts to decrease. For the vast majority of people, starting from the age of three, the level of violence decreases throughout their entire life. Only about 5% of people still maintain a relatively stable violent character during their youth. This is merely a remnant of our evolutionary struggle for survival, and a power that requires us to master through hard work and time.