Assertiveness is not a new theory, it is an old form of behavior that is being given new impetus.
Assertiveness is a positive and constructive approach to personal effectiveness.
You should begin by being clear about your own feelings and needs. Assertiveness focuses on goal orientation and self-actualizing behavior. In being assertive, the ability to be honest, open, responsive and expressive is both valued and practiced. Assertiveness recognizes basic human rights and seeks to protect these rights. Assertiveness becomes meaningful when it is contrasted with other forms of conduct, for example, aggressiveness and passivity.