Mahasi Sayadaw
It was highly popularized in the 20th century in traditional Theravada countries by Mahasi Sayadaw, who introduced the "New Burmese Satipatthana Method". It also gained a large following in the west, due to westerners who learned "vipassana" from Mahasi Sayadaw, S. N. Goenka, and other Burmese teachers. Some also studied with Thai Buddhist teachers, who are more critical of the commentarial tradition, and stress the joined practice of "samatha" and "vipassana".