Walla Zaman Ya Selahy Walla Zaman Ya Selahy "Walla Zaman Ya Selahy" () was the national anthem of the United Arab Republic (UAR), a federation of Egypt and Syria, from 1960. Though the UAR broke up in 1961, Egypt retained the official name of the union until 1971, and the official anthem until 1979. Prior to being adopted as the UAR anthem, it was a nationalist song performed by Umm Kulthum during the Suez Crisis in 1956, known in Egypt and the Arab world as the Tripartite Aggression, when Egypt was invaded by the United Kingdom, France, and Israel. Due to its strongly nationalist
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