Man has to meet three kinds of needs: primary, secondary and basic needs.
Primary needs, which can be called elementary and physiological, are needs that man can not do without for his survival. The regulation of major biological balances is necessary to maintain a state of physical health, such as to feed, breathe, reproduce ... If they are not satisfied they can override the conscience.
Secondary or material needs are those whose survival does not depend on man. For example, moving, dressing, going out, having fun and meeting people.
Basic needs are human needs like being happy, loving and making sense of things.
