William Booth was a British Methodist preacher and social reformer, best known as the founder of The Salvation Army in 1865. He dedicated his life to helping the poor and marginalized in society, emphasizing both spiritual salvation and social justice. His innovative approach combined evangelism with practical assistance, such as food, shelter, and education for those in need. Booth's work laid the foundation for a global movement that continues to operate in many countries today. He wrote several books, including In Darkest England and the Way Out, which outlined his vision for social reform. His legacy lives on through the ongoing efforts of The Salvation Army to combat poverty and promote community welfare.