The Syrian Social Nationalist Party (SSNP) is a secular, nationalist political party that advocates for the establishment of a Greater Syria, spanning from the Taurus Mountains to the Sinai Peninsula and from the Mediterranean Sea to the Arabian Desert. The party was founded in 1932 by Antoun Saadeh, and it has been active in politics in Syria, Lebanon, and other countries in the region ever since.

The SSNP's ideology is based on the concept of Syrian nationalism, which Saadeh defined as the belief that the Syrian people are a distinct nation with their own unique culture, history, and destiny. Saadeh argued that the Syrian people had been divided by artificial borders imposed by colonial powers, and that it was their destiny to unite into a single nation-state.

The SSNP's political program is based on the following principles:

• Syrian nationalism: The party believes that the Syrian people are a distinct nation with their own unique culture, history, and destiny.
• Secularism: The party is secular and does not endorse any particular religion.
• Social justice: The party believes in social justice and equality for all citizens.
• Economic development: The party supports economic development and prosperity for all Syrians.

The SSNP has been involved in Lebanese politics since its founding. The party played a leading role in the Lebanese nationalist movement, and it was involved in the Lebanese Civil War. The SSNP is currently a legal party in Lebanon, and it has several members in the Lebanese Parliament.

The SSNP was also involved in Syrian politics until it was banned by the Baath Party in 1954. The SSNP was legalized again in 2005, and it is currently one of the few legal opposition parties in Syria.