F Haanel CharlesCharles Francis Haanel (1866-1949) was an American author, businessman, and philosopher associated with the New Thought movement. Best known for The Master Key System, Haanel developed a structured program of mental training that emphasized concentraion, visualization, and purposeful thought as tools for personal achievement. His writings helped shape early twentieth-century success philosophy and influenced later generations of authors in the fields of personal development and prosperity literature. Read More Read Less