Answer
Éamon de Valera, a prominent figure in the Irish Republican movement, succeeded Arthur Griffith as the president of Sinn Féin in 1922. De Valera, known for his unwavering dedication to Irish independence, assumed leadership during a critical period in Ireland's history. His presidency marked a significant turning point in Sinn Féin's trajectory, shaping its future course and leaving a lasting impact on Ireland's political landscape.