Do you know yourself?

Among the many ideas for a story. It occurred to me how religion is supposed to make people behave in a better way but the many different religions cause friction and violence.

What if with the advance of science man's very nature could be altered by isolating a good gene. This good gene would over ride man's aggressive nature in all circumstances.

Of course in my story the super hero carrying the good gene is accidental killed much to the dismay of its creator.

On thinking more about what is good or bad it became clear psychological pressure will result in different ways on individuals and a lot of people do not know themselves.
More to the point what can be done if under pressure in the past you have acted in a way that you regret. Given under similar pressure you will probably act the same, so what can you do.

Do not act in haste. Think about the consequences of your action. Maturity is a way of thinking and not a sure thing.