Speaking at a Communist Party congress, Zyuganov said the Kremlin has been promising too much, while doing too little.
"The ruling grouping has not achieved any noticeable success, nor does it have any action plan. It has been guided by the sole goal - to stay in power at any cost," Zyuganov said.
Zyuganov said the global credit crisis has shown that the collapse of capitalism is inevitable.
"It is increasingly obvious that socialism is not a product of propaganda, but a natural and unavoidable phase of development. The collapse of the speculative financial market is a turning point," he said.
Zyuganov regretted Russia's "tragic breakup" with former Soviet republics and called for restoring the Soviet Union, which he said is quite possible. The renationalization of the country's mining, energy and other "strategic" sectors is "the key task," he said.
A program of reviving Russia that the party leaders set out at the congress also proposed reinstating direct elections of governors as a more democratic method of selecting regional leaders - abolished by then president Vladimir Putin - cutting bureaucracy, and lifting a moratorium on the death penalty for severe crimes.
The leading opposition force in the country, which resisted Putin's return as premier and a recent move to extend the presidential term from four to six years, the communists welcome an alliance with other opposition groups, Zyuganov said.