WW2 is what shot the world out of the Great Depression. People had no money, nothing to do, no work. But when the war hit, people had something to work for and they needed to work fast. During WW2, a lot (the majority) of Canadian taxes, funding, etc. went to war efforts. This could be providing food, building machinery, aircrafts, boats, clothing.
For the first time in ten years business was booming and income was being made. This change gave Canadians a purpose once again.
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These items made up a lot of the growth of Canadian GDP. They are the products that most of Canadians taxes went to in order to increase the war effort.
This graph demonstrates Canadian GDP growth. In the thirties we see the crash but in the forties, Canadian growth is exponential and even higher than in the twenties when life was "roaring."