At the turn of the 20th century, industrialization in Western Europe and North America saw new countries emerge (or return) as major economic powers. Germany (established in 1871) and the United States were the two countries that began to challenge the established powers such as Britain and the Netherlands on an industrial scale, while France's invigorated banking system compensated for its slow rate of industrialization. This period also saw Scandinavian countries catch up with modernization rates observed in other Western European countries; the wealth of natural resources, increased industrial output, and strong shipping networks combined to allow GDP per capita to grow at rates similar to the United States and France and Germany.

Between 1970 and 1913, GDP per capita in the three emerging regions roughly doubled, outpacing growth in countries considered economic and industrial "leaders" for most of the 1800s. While Britain had been the leading global superpower for most of the 19th century and still maintained healthy economic growth in the given period, the rise of Germany and the U.S. at this time would (and, later, the Soviet Union) go on to shape global economic development over the subsequent decades.

From 1820 to 1913, the global GDP almost quadrupled, from just under 700 billion FY1990 U.S. dollars to more than 2.7 trillion FY1990 USD. As Europe industrialized throughout this period, its share of the global GDP increased from roughly one-third in 1820 to 46 percent in 1913, with Western European* countries disproportionately driving this growth. However, the combined growth of North America, Australia, and New Zealand saw the most significant development over this period, rising from 14 billion FY1990 USD in 1820 to 583 billion FY1990 USD in 1913. While the Asia-Pacific region had the largest share of global GDP in 1820, the slower rate of industrialization meant that its share dropped significantly by 1913. This region saw the lowest growth rate during this period.

View economic output, reported as the nominal value of all new goods and services produced by labor and property located in the U.S.

Between 1820 and 1913, the world's total GDP per capita grew approximately 2.4 times larger. The most significant growth was seen in the industrialized nations of the U.S., Canada, Australia, and New Zealand, where GDP per capita in 1913 was almost 4.4 times larger than in 1820. The regions of Asia-Pacific and Africa saw the lowest level of growth in this period.

On October 29, 1929, the U.S. experienced the most devastating stock market crash in it's history. The Wall Street Crash of 1929 set in motion the Great Depression, which lasted for twelve years and affected virtually all industrialized countries. In the United States, GDP fell to it's lowest recorded level of just 57 billion U.S dollars in 1933, before rising again shortly before the Second World War. After the war, GDP fluctuated, but it increased gradually until the Great Recession in 2008. Real GDP Real GDP allows us to compare GDP over time, by adjusting all figures for inflation. In this case, all numbers have been adjusted to the value of the US dollar in FY2012. While GDP rose every year between 1946 and 2008, when this is adjusted for inflation it can see that the real GDP dropped at least once in every decade except the 1960s and 2010s. The Great Recession Apart from the Great Depression, and immediately after WWII, there have been two times where both GDP and real GDP dropped together. The first was during the Great Recession, which lasted from December 2007 until June 2009 in the US, although its impact was felt for years after this. After the collapse of the financial sector in the US, the government famously bailed out some of the country's largest banking and lending institutions. Since recovery began in late 2009, US GDP has grown year-on-year, and reached 21.4 trillion dollars in 2019. The coronavirus pandemic and the associated lockdowns then saw GDP fall again, for the first time in a decade. As economic recovery from the pandemic has been compounded by supply chain issues, inflation, and rising global geopolitical instability, it remains to be seen what the future holds for the U.S. economy.

On the eve of the First World War in 1913, the United Kingdom was the only major Western European economy with productivity rates similar to the United States, although U.S. GDP per hour worked was still 14 percent higher. Across Western Europe, average productivity was below 60 percent of the U.S.' rate in 1914. By the end of the Second World War's recovery period in 1950, the U.S. had actually widened this gap, as it did not experience the same level of destruction that was felt across most of Western Europe, and economic output was not affected in this way. By the end of the century however, the economies of Western Europe had largely caught up with the U.S. in terms of productivity, with France even exceeding the U.S.' rate by two percent. Of the major economies in Western Europe, the United Kingdom went from having the highest productivity rates in 1913 and 1950, to having the lowest in the 1990s.