I don't know when it was larger. However in the 1960s it was of equal size. https://ourworldindata.org/grapher/gross-domestic-product?tab=chart&stackMode=relat

I don't know when it was larger. However in the 1960s it was of equal size. https://ourworldindata.org/grapher/gross-domestic-product?tab=chart&stackMode=relative&country=USA~European+Union~GBR https://ourworldindata.org/grapher/gross-domestic-product?ta... Starting in the 1980s US GDP inflected and EU did not. The gap appeared then and has got wider ever since. What happened in the 80s? Probably tech?