The map above shows the top 10 oil producing countries in 1939. Three big things stand out to me:First, of all Nazi Germany, Italy and Japan are not among the top 10.Two, Saudi Arabia and other Gulf states are also not among the top 10.Just how much more dominant the US was than everyone else. You can see the table below but US production was more than double the next 9 combined.Here is the data by country:CountryBarrels of OilShare of World Oil ProductionUnited States1,169,471,69860.0%Venezuela208,881,64610.7%USSR207,287,64610.6%Iran66,578,3293.4%Indonesia54,380,5112.8%Romania42,688,9412.2%Mexico41,991,1412.2%Iraq27,111,5821.4%Colombia22,575,8821.2%Trinidad and Tobago19,599,9701.0%Argentina18,218,0530.9%Peru12,273,0710.6%Myanmar7,203,7590.4%Bahrain7,101,1410.4%Canada6,957,4760.4%Brunei5,342,9590.3%Germany5,062,4710.3%Egypt4,556,2230.2%Saudi Arabia3,687,3940.2%Poland3,591,6180.2%China2,627,0120.1%Japan2,202,8590.1%India2,127,6060.1%Ecuador2,086,5590.1%Malaysia1,149,3180.1%Austria985,1290.1%Hungary985,1290.1%Albania964,6060.0%France478,8820.0%Bolivia191,5530.0%Czechoslovakia143,6650.0%Italy82,0940.0%Morocco34,2060.0%Taiwan34,2060.0%United Kingdom27,3650.0%Barbados6,8410.0%Yugoslavia6,8410.0%Algeria-0.0%Angola-0.0%Australia-0.0%Bangladesh-0.0%Brazil-0.0%Bulgaria-0.0%Cameroon-0.0%Chile-0.0%Congo-0.0%Cote d'Ivoire-0.0%Cuba-0.0%Democratic Republic of Congo-0.0%Denmark-0.0%Gabon-0.0%Ghana-0.0%Greece-0.0%Guatemala-0.0%Israel-0.0%Kuwait-0.0%Libya-0.0%Mongolia-0.0%Netherlands-0.0%New Zealand-0.0%Nigeria-0.0%Norway-0.0%Oman-0.0%Pakistan-0.0%Philippines-0.0%Qatar-0.0%Spain-0.0%Suriname-0.0%Sweden-0.0%Syria-0.0%Thailand-0.0%Tunisia-0.0%Turkey-0.0%United Arab Emirates-0.0%The data comes from Our World In Data and has been converted from TWh to Barrels.