<P> The Arab states in changing alliances were involved in a number of wars with Israel and its western allies between 1948 and 1973, including the 1948 Arab--Israeli War, the 1956 Suez Crisis, the Six - Day War of 1967, and the Yom Kippur War of 1973 . An Egypt--Israel Peace Treaty was signed in 1979 . </P> <P> The Iran--Iraq War (also known as the First Gulf War and by various other names) was an armed conflict between the armed forces of Iraq and Iran, lasting from September 1980 to August 1988, making it the second longest conventional war of the 20th century . It was initially referred to in English as the "Gulf War" prior to the "Gulf War" of 1990 . </P> <P> The war began when Iraq invaded Iran, launching a simultaneous invasion by air and land into Iranian territory on 22 September 1980 following a long history of border disputes, and fears of Shia Islam insurgency among Iraq's long - suppressed Shia majority influenced by the Iranian Revolution . Iraq was also aiming to replace Iran as the dominant Persian Gulf state . Although Iraq hoped to take advantage of the revolutionary chaos in Iran (see Iranian Revolution, 1979) and attacked without formal warning, they made only limited progress into Iran and were quickly repelled by the Iranians who regained virtually all lost territory by June 1982 . For the next six years, Iran was on the offensive . </P> <P> The Lebanese Civil War was a multifaceted civil war in Lebanon, lasting from 1975 to 1990 and resulting in an estimated 120,000 fatalities . Another one million people (a quarter of the population) were wounded, and today approximately 76,000 people remain displaced within Lebanon . There was also a mass exodus of almost one million people from Lebanon . </P>

What is the population of the arab world