The 1998 book, Choice Theory: A New Psychology of Personal Freedom, is the primary text for all that is taught by The William Glasser Institute. Choice theory states that:

• all we do is behave,
• that almost all behavior is chosen, and
• that we are driven by our genes to satisfy five basic needs: survival, love and belonging, power, freedom and fun.

In practice, the most important need is love and belonging, as closeness and connectedness with the people we care about is a requisite for satisfying all of the needs.

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.Choice theory, with the Seven Caring Habits, replaces external control psychology and the Seven Deadly Habits. External control, the present psychology of almost all people in the world, is destructive to relationships. When used, it will destroy the ability of one or both to find satisfaction in that relationship and will result in a disconnection from each other. Being disconnected is the source of almost all human problems such as what is called mental illness, drug addiction, violence, crime, school failure, spousal abuse, to mention a few