Maadi from the Egyptian army, future president Anwar Sadat. Following the 1952 Revolution, after which the British colonial occupation ended, and the 1956 Suez Crisis, or Tripartite Aggression, in which Britain, France and Israel attacked Egypt to regain control of the Suez Canal, British and French expatriates living in Maadi and elsewhere were forced to leave Egypt. As a result, some of their institutions, such as St.John's Anglican Church, were taken over and run temporarily by other nationalities. The oldest area in Maadi is El Sarayat, composed mostly of villas and low rise buildings. It is the most affluent part of
Frustration–aggression hypothesis unjustified condition participants. The authors concluded that unjustified frustration leads to greater level of aggression, compared to justified frustration, which, in turn, results in higher levels of aggression compared to the non-frustration situations. In 1964, Leonard Berkowitz stated that it is necessary to have an aggression stimulus to make aggression take place. Then in 1974 and 1993, he remodified the frustration/aggression hypothesis into a theory that removed the importance of aggressive cues to the aggressive behavior. Which is to say, extremely angry subject will show aggression even if the aggression cue is absent. The most provocative theory introduced by Berkowitz