For industrialized nations, strategic resources (in terms of Civ5) include - Food, - Iron, - Coal, - Oil, - Aluminium, etc. Population Growth in industrial age resulted in a situation where many well developed nations like England, Germany or also Japan needed to import large quantities of Food from abroad since the population had massively outgrown agricultural production in their homeland. Iron was needed for producing industrial tools and machines as well as weapons, ships, railroads and trains. Coal and Oil were sources of Energy which fueled steam machines and power plants for industrial production as well as combustion engines for transportation, modern warships and tanks and airplanes. History has shown that supply with ALL strategical resources in industrial era is necessary for a global player (industrial power) to stay in the game ... nations may be either self-supplying (like the wide empires of USA, Russia/Soviet Union, British Empire = "the Haves") or they may try to supply themselves via international trade, which includes dependance on economic crisis (less trade during depression) and possibility of embargo/blockade (blackmail), or they may try to conquer the missing resources (which makes them to "Aggressors"). - Food embargos/blockades were used in WW1 and WW2 by the British against Germany, leading to german countermeasures (U-Boat-Blockade of British Isles) and the try to conquer eastern european (Ukrainian) agricultural regions to compensate. (In WW1 the british blockade caused a famine in Germany with ca. 700.000 civilian deaths.) - The need for Oil resources caused the (unsuccessful) German attack on the Caucasus region in 1942. Destruction of the german hydrogenation plants in 1944 virtually ended the war for Germany, since majority of tanks and planes were grounded. - The American and British (Oil) Embargo against Japan in 1941 triggered Japanese assault on the US Fleet at Pearl Harbor as well as american, british, dutch, australian colonial possessions in South-East-Asia to compensate Oil and other resources before the japanese industry and war machine (in China) would collapse. The destruction of Japanese navy/merchant navy (= strategic resources) in 1944/45 in combination with destruction of Japanese cities/factories made it impossible for Japan to continue the war offensively. Civ5 was not very consistent with strategic resources in almost every aspect, e.g. - making Coal (steam machine) a requirement for Factory, ignoring oil and other alternative sources of energy like power plants - making Oil a requirement for Tanks but not Iron - having no requirement for Mechanized Infantery etc. Strategic resources are not equally distributed on earth. Strategic resources are so important to industrial nations that a group of empires which controls the majority of strategic resources (like Food, Oil) can embargo the rest of the world and make them stop and starve, taking them out of the game ... I think Civ6 should respect historic realities and allow players who dominate in terms of controlled strategic resources as well as industrial capacity and military strength to win an early domination victory. (e.g. US would have won in 1945 if there would not have been the Soviet Union as counterweight.) The fact that resources are not spread equally should force all players to start in time (before 1900) on a wide empire to not loose the game due to lack of strategic resources.