Ethics.

Ethics (ἠθικόν) means "moral nature" in Greek language. This science is a part of another study philosophy.

In Ancient Greece Plato and Socrates studied ethics. So, science about human behavior had a long and interesting history.

Ethics had a Golden Rule: "the principle of treating others as you want to be treated."

Students study this science during school lessons. Also, ethics can be part of social studies. Teachers teach children good behavior.

Etiquette had many rules about society and relationships. What can and can't people be asked about. How to start conversations in a place. Good manners are important for etiquette and ethics.

This science changed through history. Many different aspects had their own unique rules for behavior.

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Psychology.

Psychology (Ψυχολογία) is a science about soul. It's part of philosophy. Psychē (ψυχή) means "soul" and -logia (-λογία) means "study of".

This study is difficult but interesting. Human behavior and soul are important for psychology. Person and his decisions are explained by this science.

Different people have different tempers and opinions. Psychology has unique terms. For example, projections, a defense mechanism when humans show their own feelings and thoughts in other people or subjects.

Psychologists are talking with people. It helps to understand a person and his problems. These professionals advise in schools and hospitals.

This science has own long history. In ancient times philosophers studied human behavior.

Psychology is still studied in schools and institutes. It's needed for many things.

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