The Vozrozhdenie was a non-Marxist tendency which was led by the nonmarxist thinker and politician Chaim Zhitlowsky.
[1] Leaders of the party included Avrom Rozin (Ben-Adir), Nokhem Shtif, Moyshe Zilberfarb and Mark Ratner.
It envisaged a federation of nationalities in Russia, each led by an elected body of representatives with political powers inside their community.
The alliance was however mainly the product of the relations between Zhitlowsky and Mark Ratner, and did not have full support from the SERP grassroots.
Just after the deal with PSR, SERP gained a consultative vote at the 1907 Stuttgart congress of the International.