Ottomanism refers to the ideology that aimed to create a sense of unity among the diverse peoples and cultures within the Ottoman Empire, promoting loyalty to the empire above individual ethnic or religious identities. This concept emerged in the 19th century as a response to nationalist movements and was an effort to forge a shared Ottoman identity among various groups, such as Turks, Arabs, Greeks, and Armenians. Ottomanism was significant in shaping the empire's policies towards its subjects and influenced the modernization efforts during this period.