Bahaeddin Shakir or Bahaddin Şakir was a physician, Turkish nationalist politician, and one of the architects of the Armenian genocide. Though he was not a minister or deputy in the government, he held powerful sway in the Central Committee of the Committee of Union and Progress and was the director of the Şûrâ-yı Ümmet, a magazine that supported the party. He was one of the three important names of the "Doctors Group" in the CUP ; He was a part of the pan-Turkist/Turanist wing of Union and Progress.

The Committee of Union and Progress, refers to several revolutionary groups and a political party active between 1889 and 1926 in the Ottoman Empire and the Republic of Turkey. The foremost faction of the Young Turks, the CUP instigated the 1908 Young Turk Revolution, which ended absolute monarchy and began the Second Constitutional Era. After an ideological transformation, from 1913 to 1918, the CUP ruled the empire as a dictatorship and committed genocides against the Armenian, Greek, and Assyrian peoples as part of a broader policy of ethnic erasure during the late Ottoman period. The CUP and its members have often been referred to as Young Turks, although the movement produced other political parties as well. Within the Ottoman Empire its members were known as İttihadcılar ('Unionists') or Komiteciler ('Committeemen').