As of 2016, the self-help movement comprised an unregulated, $9.9 billion dollar industry in the United States alone. (That number does not include the amount spent on medications.) Self-help experts have become household names: Tony Robbins, Marianne Williamson, Wayne Dyer, Stephen Covey, Deepak Chopra, Zig Ziglar, and more. Reading such books as Men Are From Mars, Women Are from Venus (1992) by John Gray, Ph.D. to The 7 Habits of Highly Effective People (1989) by Stephen Covey, DRE, people seek to improve both their personal and professional lives.