Regimes approximated as totalitarian have developed in the twentieth century through new techniques that mobilize entire populations in support of the state and a political ideology. The main examples of regimes considered totalitarian are Nazi Germany, Fascist Italy, the Soviet Union under Joseph Stalin. Totalitarian systems, however, may not be as monolithic as they appear, since they may hide a process in which several groups—the army, political leaders, industrialists, and others—compete for power and influence.