The main fault line in Lebanese politics is the division between Shiite and Sunni Muslims. Years in the making, this divide must be overcome soon or it could plunge Lebanon into another civil war.

Recent sectarian clashes in north Lebanon and Beirut are but a symptom of this growing divide. At the political-leadership level, Hezbollah’s Sayyed Hassan Nasrallah and the Future Movement’s Saad Hariri — the Shiite and Sunni de facto leaders — are not on speaking terms. At the grassroots level, a wall of fear and mistrust separates Lebanon’s two largest communities.

In the 2009 parliamentary elections, 93.1 percent of the Shiite vote went for Hezbollah candidates while 76 percent of Sunnis voted for Future Movement candidates.

Each of these parties enjoys a significant level of support from the Christian community, the third-largest religious bloc in Lebanon after Shiites and Sunnis. In the 2009 elections, the Christian vote split almost equally with 46.1 percent going to the Future-led March 14 coalition, and 49.4 percent for the Hezbollah-led March 8 coalition.