world history 1920-45

When one looks back at world history between roughly 1920 to 1929, we see a rather bright time globally, between the roaring twenties, the rise of scientific, philosphoical, political ideas world wide, the peak of architecture in the America, great films, arts culture etc. it was a great and booming decade.  1930 through 1945 times got much darker, then after world war 2 another great boom in western civilized cultures, all the way up to the housing collapse and stock market collapse of september 2008, will we suffer another decade between 2010 and 2020 of darker times? or has the sun began to peak through the clouds?