Yisrael Meir Kagan

Yisrael Meir ha-Kohen Kagan was a Lithuanian rabbi, posek, and ethicist whose works are widely influential in Orthodox Jewish life. He was known popularly as the Chofetz Chaim, after his book with that title on lashon hara, and was also well known for the Mishnah Berurah, his book on ritual law.