Such was the man who led the crusade against the converts to Hasidism. But even he could not stem the current. In their despair, the Lithuanian Jews turned to their coreligionists in Germany, and implored their assistance in eradicating, or at least suppressing, the threatened invasion. The great learning and literary ability of the "divine philosopher, Rabbi Moses ben Menahem" (Mendelssohn, 1729-1786), were appealed to for help. Not a stone was left unturned to crush the new sect (kat), so called. Volumes of the _Toledot Ya'akob Yosef_, in which Rabbi Jacob Joseph of Polonnoy set forth the principles of the Besht, were burnt in the market-place in Vilna. Intermarriage, social intercourse of any kind, was prohibited between Hasidim and Mitnaggedim. In Vilna, Grodno, Brest, Slutsk, Minsk, Pinsk, etc., the ban was hurled against the dissenters by the most prominent rabbis. Israel was divided into two hostile camps.[20] But soon everything was changed. Hasidim and Mitnaggedim discovered that while they were fighting each other, a common enemy was undermining the ground on which they stood. The Haskalah was steadily drawing recruits from both, and it threatened ultimately to become more dangerous to both than they were to each other. From the South had come the impulse of religious revivalism through the followers of the Besht, and the North was showing signs of awakening through the reforms of the Gaon. At the same time a ray of enlightenment from the West pierced through the night. To make the regeneration of Slavonic Judaism complete, the element of estheticism had to be added to emotionalism and reason. From the warm South came Besht, from the studious North Hagra, and Rambman (Mendelssohn) made his appearance from the enlightened West. The triumvirate was complete.