Glasser.

Glasser played a key role in the identification of the choice theory, which relies on the his five basic needs, which are precursers to our behaviour.

Glasser's Five points are as follows:

1. Survival



2. Power



3. Belonging/need for love



4. Fun



5. Freedom

The term choice theory is the work of Dr. William Glasser, MD, author of the book so named, and is the culmination of some 50 years of theory and practice in psychology and counseling. Choice theory is also a discipline of analyzing the mathematical nature of the choice behavior of economic agents in microeconomics. For choice theory in economics, see rational choice theory.