Organizers say the main goal of the two-day conference is to give a signal that there is a "different Russia" ahead of the July 15-17 G8 summit in St. Petersburg.
Former chess champion Garry Kasparov
and other opposition leaders opened the conference. Former Prime Minister Mikhail Kasyanov, who has signaled his intention to run for president in 2008, is among the participants, as is Andrei Illarionov, an outspoken former economic adviser to President Vladimir Putin who resigned in protest in late 2005 against the rise of what he called a "corporate state.
The state-run daily newspaper "Rossiiskaya gazeta" commented on July 11 that the circumstances surrounding the Other Russia meeting reflect the deep divisions within the opposition.
Conference organizers said some of the activists were detained and beaten ahead of the Moscow forum.
Western diplomats, inlcuding British Ambassador to Russia Anthony Brenton, U.S. Assistant Secretary of State for Democracy, Human Rights, and Labor Barry Lowenkron, and U.S. Assistant Secretary of State for European and Eurasian Affairs Daniel Fried, are attending the conference.
The two main liberal parties, Yabloko and the Union of Rightist Forces, are boycotting the event over the participation of what they consider to be nationalist and extremist groups.
MORE: For coverage of this event from RFE/RL's Russian Service in Russian, click here.