Don Miguel Ruiz is a Mexican author known for his teachings on Toltec spirituality and neoshamanism. Best known for his 1997 bestseller The Four Agreements, Ruiz's work is embraced by the New Thought movement and has influenced many seeking spiritual enlightenment. His books, including The Mastery of Love and The Voice of Knowledge, have helped spread Toltec wisdom worldwide. Ruiz was named one of the Watkins 100 Most Spiritually Influential Living People in 2018. He also co-authored The Fifth Agreement with his son Don José Ruiz and has continued to write and teach on personal freedom and love.