1930 type economic depression…well last time it happened the world witnessed World War 2 to revive the economy…are we on the brink of World War 3…

Here’s what Wikipedia says

(The common view among economic historians is that the Great Depression ended with the advent of World War II. Many economists believe that government spending on the war caused or at least accelerated recovery from the Great Depression, though some consider that it did not play a very large role in the recovery. It did help in reducing unemployment.[11][90][91]

The rearmament policies leading up to World War II helped stimulate the economies of Europe in 1937–39. By 1937, unemployment in Britain had fallen to 1.5 million. The mobilization of manpower following the outbreak of war in 1939 ended unemployment.[92]

The US’ entry into the war in 1941 finally eliminated the last effects from the Great Depression and brought the U.S. unemployment rate down below 10%.[93] In the U.S., massive war spending doubled economic growth rates, either masking the effects of the Depression or essentially ending the Depression. Businessmen ignored the mounting national debt and heavy new taxes, redoubling their efforts for greater output to take advantage of generous government contracts.)

Present crisis.

RBI governor Raghuram Rajan has asked central banks from across the world to define “new rules of the game” as he warned that the global economy may be slipping into problems similar to the Great Depression of the 1930s.