ربيع دمشق
He maintained a keen and sympathetic interest in Syria despite his criticism of its involvement in Lebanon, and was on close terms with many Syrian intellectuals, including those involved in the Damascus Spring. He was a founding member of the Democratic Left Movement, which won a seat in the Lebanese parliamentary elections of 2005. Kassir and the party he helped establish were both very influential in triggering the popular upheavals following Prime Minister Rafik Hariri's killing.