Thomas Welch was an American physician and the founder of the grape juice industry. He is best known for developing a method to pasteurize grape juice, making it safe for consumption and preserving its flavor. This innovation led to the creation of Welch's Grape Juice, a popular beverage enjoyed by many. Born in 1825, Welch was also a Methodist minister who sought to provide a non-alcoholic alternative to wine for communion services. His efforts contributed to the temperance movement in the United States, promoting healthier choices and influencing the way grape juice is consumed today.