Lyman Beecher (1775-1863) was an influential American preacher and theologian known for his role in the Second Great Awakening, a religious revival movement in the early 19th century. He was a prominent figure in the Congregationalist church and later became a leader in the Presbyterian denomination. Beecher was also a strong advocate for social reform, particularly in areas like temperance and education. In addition to his preaching, Beecher was the father of several notable figures, including the author Harriet Beecher Stowe and the educator Catherine Beecher. He served as the president of Lane Theological Seminary in Ohio, where he influenced many future ministers. His legacy includes a commitment to moral reform and the promotion of religious values in American society.