Short answers, pulled from the story.
John Wesley was an English cleric, theologian, and evangelist who became a principal leader of a revival movement within the Church of England known as Methodism. The societies he founded became the dominant form of the independent Methodist movement, which today numbers 75 million adherents in more than 130 countries.
On the evening of the 24th of May 1738, John Wesley attended a religious society on Aldersgate Street in London where someone read Martin Luther's preface to the Epistle to the Romans. About a quarter before nine he felt his heart strangely warmed and gained an assurance that his sins were taken away. The date is commemorated in Methodist churches as Aldersgate Day.
John Wesley sailed to Savannah in 1735 at the request of James Oglethorpe but his High Church ministry proved controversial. He fell in love with Sophia Hopkey, and after she married William Williamson he denied her Communion, leading to legal proceedings. On the 22nd of December 1737 Wesley fled the colony and returned to England.
John Wesley rejected the Calvinist understanding of predestination, holding instead that prevenient grace made all people capable of being saved by faith. His system became known as Wesleyan Arminianism, and in 1739 he attacked predestination as blasphemous in a sermon called Freedom of Grace. In 1778 he began The Arminian Magazine to preserve Methodists.
John Wesley denounced slavery as the sum of all villainies and wrote the tract Thoughts Upon Slavery in 1774, later mentoring abolitionist William Wilberforce. He also opened Methodism to women preachers, informally allowing Sarah Crosby to preach in 1761 and formally permitting women to preach in 1771 after Mary Bosanquet defended the practice.
John Wesley died on the 2nd of March 1791 at the age of 87, repeating the words The best of all is, God is with us. He was entombed at his chapel on City Road in London. He left behind 135,000 members and 541 itinerant preachers, and is said to have ridden 250,000 miles and preached more than 40,000 sermons.