Like most Lebanese-Marxist intellectuals at the time, Muruwwa remained in Beirut throughout the Lebanese Civil War (1975-1990). At the time, the LCP was allied with Kamal Jumblatt's Lebanese National Movement which made it a target of other factions. Despite this, Muruwwa continued writing even in the harshest circumstances and conditions in the LCP-owned newspaper "Al-Nida"'. Additionally, in the early 80s Muruwwah played a key role in establishing the Lebanese National Resistance Front (LNRF) following the invasion of Israel in 1982 which until Hezbollah was the only armed resistance group to Israel.