Long before The Secret, writers and healers in the New Thought movement argued that the mind shapes reality. In this clear, wide‑ranging history, John S. Haller Jr. traces New Thought from its nineteenth‑century roots—Phineas P. Quimby, Emma Curtis Hopkins, and others—through William Walker Atkinson, an early popularizer of the “law of attraction,” to its imprint on modern self‑help and popular psychology.

Rather than centering on denominations, Haller follows people, practices, and ideas: mental healing, affirmations, prosperity teachings, and the movement’s dialogue with science and religion (including the influence of the Swedish scientist, mystic and theologian Emanuel Swedenborg). He shows how New Thought migrated from lectures and magazines into boardrooms, pulpits, and bestsellers, shaping a durable American optimism: the conviction that thought can transform life.

The History of New Thought is essential reading for anyone interested in American religious history, psychology, or the roots of contemporary self‑help.