It is genetic – people keep repeating mistakes

Most people tend to learn from their mistakes and avoid making the same blunder twice. But we find lots of people making same mistakes again and again. Now scientist found a new relationship between a specific gene and those of us prone to repeatedly making the same mistakes. From the nature article:

A genetic mutation that helps to determine the extent to which certain people are doomed to repeat history.

Drug addicts, alcoholics and compulsive gamblers are known to be more likely than other people to have this genetic mutation, which leaves them with fewer receptors of a certain type in the brain. These receptors — called D2 receptors – are activated when levels of the neurotransmitter dopamine drop.

=> The gene that makes us once bitten, twice shy