Who was Britain's first Labour Party Prime Minister?

James MacDonald was Britain's first Labour Party Prime Minister, serving two non-consecutive terms, the first starting in 1924 and the second from 1929 to 1935. His leadership marked a significant moment in British politics, as he was the first to lead a government formed by the Labour Party, which represented a new political force in the country that advocated for workers' rights and social reform. MacDonald's rise to this position symbolized the gradual shift in British society towards more inclusive and progressive governance, making him a pivotal figure in the history of the Labour movement.

In contrast, the other individuals listed have played important roles in British politics but did not hold the distinction of being the first Labour Prime Minister. Keir Starmer is a contemporary politician and the current leader of the Labour Party but has not yet held the office of Prime Minister. Clement Attlee, who served as Prime Minister after World War II, is known for implementing sweeping social reforms but came into power after MacDonald. Harold Wilson also served as Prime Minister later on and is recognized for his significant contributions to Labour policies but, again, did so after MacDonald's time as the first in this capacity.