Humans adapt (not change) according to environmental conditions;
But only as long as they are in that environment.
In other words, it is not possible to change the nature and shape of any human being in this world; Rather, through education, only the right direction can be given to him.
Of course, this upbringing can be fixed in the genes little by little over several generations.
So, on the path of life, we only have the right to choose who we travel with; Someone who is 80% close to us in terms of temperament.
Regardless of age, gender, religion, race, ethnicity, we should have friendship and positive and constructive interaction with good people.