Rav Shraga Feivel Mendlowitz (1886 - 7 September 1948) was a person of deep complexity and contemplation, he pursued Jewish philosophy and mussar privately, and at a young age had completed the entire works of the Maharal, Kuzari, Mesilas Yeshorim, and works of chasidus.
Although Rav Shraga Feivel appeared an unassuming young man, he had a rare strain of boundless idealism running through his fabric. When he came across the statement in the Gemara that, "Were Klal Yisroel to keep two Shabbosim in a row, the geulah would immediately come," he promised himself then and there that he would work to draw the hearts of Jews back to their Father in Heaven. This clear conviction lead him to found Torah Vodaas and Torah U'Mesorah. In the words of Rav Moshe Feinstein, "Were it not for him, there would be no Torah study and no Fear of Heaven at all in America."
Rav Shraga Feivel Mendlowitz's biography is available from Artscroll.