worldwide financial crisis; global depression
Often refers specifically to the Great Depression of the 1930s, but can also denote any severe global economic downturn.
See also: 世界大恐慌
世界恐慌は1929年に始まった。
The Great Depression began in 1929.
次の世界恐慌を防ぐために、各国が協力する必要がある。
To prevent the next global depression, countries need to cooperate.