John Newton (1725–1807) was an English preacher, hymn-writer, and former slave trader whose dramatic conversion and ministry profoundly influenced evangelical Christianity. Born in Wapping, London, to John Newton, a merchant ship captain, and Elizabeth Scatliff, a devout Nonconformist who died when he was seven, Newton was raised by his stepmother after his father remarried. Pressed into the Royal Navy at 19, he later joined the slave trade, captaining ships like the Duke of Argyle by 1750, a life marked by cruelty and debauchery until a violent storm off Ireland in 1748 sparked his spiritual awakening at age 22. Self-educated in theology, he left the trade in 1755, becoming a surveyor of tides in Liverpool while pursuing ministry. In 1757, he married Mary Catlett, his childhood sweetheart, with whom he had no surviving children, though they adopted two orphaned nieces. Newton’s preaching career began after his ordination in the Church of England in 1764, when he was appointed curate of Olney, Buckinghamshire, serving there until 1780. His sermons, rich with personal testimony, drew large crowds and fostered a collaboration with poet William Cowper, producing the Olney Hymns (1779), including Newton’s famous “Amazing Grace.” In 1780, he became rector of St. Mary Woolnoth in London, where he preached until nearly blind and deaf, mentoring younger evangelicals like William Wilberforce in the abolitionist cause he embraced late in life, detailed in his 1788 pamphlet Thoughts Upon the African Slave Trade. Newton died on December 21, 1807, in London, leaving a legacy as a preacher whose journey from sin to grace inspired hymns, sermons, and a movement against slavery that echoed beyond his time.