Global stratification refers to the unequal distribution of wealth, power, and resources among nations. There are several theories that attempt to explain this stratification, including modernization theory and dependency theory. Modernization theory views stratification as due to differences in technological development and industrialization, while dependency theory argues that underdeveloped nations are held back by the exploitation and dominance of wealthy core nations. Both theories have been criticized for being overly simplistic explanations of a complex global system.