Throughout the Great Depression, the Soviet Union's isolation and removal from the capitalist system meant that its industrial production grew by more than 300 percent between 1929 and 1938, compared to the relatively low figures across the rest of Europe and the U.S. The Soviet Union was the only country of those listed whose industrial output did not fall in the years immediately following the Wall Street Crash of 1929. The U.S. and Germany, conversely, saw industrial production fall by 45 and 41 percent, respectively, although they had the fourth and second highest growth rates of the period between 1932 and 1938.

The early-20th century is often considered the most destructive period in European history, with the interwar period of the 1920s and 1930s being defined by various aspects including recovery from the First World War, as well as fluctuating political and economic stability. In particular, the onset of the Great Depression in the U.S. created a ripple effect that was felt across the globe, especially in Europe. During this time, all major currencies were connected via the gold standard; however, several European countries had suspended the gold standard to print additional money during the First World War, and conditions had not re-stabilized by the onset of the Great Depression in the U.S. - the given countries would all abandon the gold standard by the outbreak of war in 1939. Germany Additionally, American investors withdrew much of their capital from Europe in the wake of the Wall Street Crash in 1929, and the U.S. government ceased all loans to Germany and demanded advanced repayments. The German economy had already collapsed in the early-1920s, and it became dependent on American loans to stabilize its economy and meet its reparation payments - this move by the American government caused a German economic collapse once more, sending the economy into a downward spiral. Regional differences For France, its industrial output dropped in the wake of the Great Depression, and it would not reach these levels again until after the Second World War. In contrast, the Soviet Union was largely shielded from the Great Depression, and its industrial output grew significantly in the build-up to WWII (albeit from a much less-developed starting point). For the other three countries listed, output would not reach pre-Depression levels until at least 1934.

Between the Wall Street Crash of 1929 and the end of the Great Depression in the late 1930s, the Soviet Union saw the largest growth in its gross domestic product, growing by more than 70 percent between 1929 and 1937/8. The Great Depression began in 1929 in the United States, following the stock market crash in late October. The inter-connectedness of the global economy, particularly between North America and Europe, then came to the fore as the collapse of the U.S. economy exposed the instabilities of other industrialized countries. In contrast, the economic isolation of the Soviet Union and its detachment from the capitalist system meant that it was relatively shielded from these events. 1929-1932 The Soviet Union was one of just three countries listed that experienced GDP growth during the first three years of the Great Depression, with Bulgaria and Denmark being the other two. Bulgaria experienced the largest GDP growth over these three years, increasing by 27 percent, although it was also the only country to experience a decline in growth over the second period. The majority of other European countries saw their GDP growth fall in the depression's early years. However, none experienced the same level of decline as the United States, which dropped by 28 percent. 1932-1938 In the remaining years before the Second World War, all of the listed countries saw their GDP grow significantly, particularly Germany, the Soviet Union, and the United States. Coincidentally, these were the three most powerful nations during the Second World War. This recovery was primarily driven by industrialization, and, again, the U.S., USSR, and Germany all experienced the highest level of industrial growth between 1932 and 1938.

In 1938, the year before the Second World War, the United States had, by far, the largest economy in the world in terms of gross domestic product (GDP). The five Allied Great Powers that emerged victorious from the war, along with the three Axis Tripartite Pact countries that were ultimately defeated made up the eight largest independent economies in 1938.

When values are converted into 1990 international dollars, the U.S. GDP was over 800 billion dollars in 1938, which was more than double that of the second largest economy, the Soviet Union. Even the combined economies of the UK, its dominions, and colonies had a value of just over 680 billion 1990 dollars, showing that the United States had established itself as the world's leading economy during the interwar period (despite the Great Depression).

Interestingly, the British and Dutch colonies had larger combined GDPs than their respective metropoles, which was a key motivator for the Japanese invasion of these territories in East Asia during the war. Trade with neutral and non-belligerent countries also contributed greatly to the economic development of Allied and Axis powers throughout the war; for example, natural resources from Latin America were essential to the American war effort, while German manufacturing was often dependent on Swedish iron supplies.