A "Shia majority" refers to a demographic situation where the majority of a population identifies as Shia Muslims. Shia Islam is one of the two main branches of Islam, the other being Sunni Islam. Shia Muslims believe in the leadership of the Imams, who are considered to be the rightful successors to the Prophet Muhammad. Countries like Iran and Iraq have significant Shia majorities, influencing their political and social structures. In these regions, Shia beliefs and practices play a central role in cultural identity and governance. The presence of a Shia majority can also affect regional dynamics and relationships with neighboring countries.