Huseynzade’s time in
Istanbul spanned several decades, with his first stay in the
Ottoman capital lasting from 1889 to 1903. During this period, he maintained his Russian subjecthood but acquired
Ottoman subjecthood shortly after his arrival. Over the course of his fourteen years in
Istanbul, he formed friendships with key figures of the
Committee of Union and Progress (CUP) such as
Abdullah Cevdet,
Ibrahim Temo. These connections made in the 1890s would later benefit him in his political and intellectual endeavors. In 1903, Huseynzade returned to
Russia, reportedly due to police harassment stemming from his
CUP affiliations. In 1903, Ali bey returned home and spent the next seven years in
Baku. During this period of time, he engaged in scholarly and publishing activities, edited the
Hayat newspaper, and served as a chief editor of the
Kaspiy newspaper. Huseynzade coedited
Hayat with
Ahmet Aghaoglu until 1906, when Aghaoglu left to work for
İrşad. In 1905, he joined
Alimardan bey Topchubashov, Reşit Ibragimov, Farrukh bey Vezirov and
Ahmet Aghaoglu as a part of the Azerbaijani delegation to an all-Russian convention of Muslims, where an agreement was reached on establishing of the
Ittifaq al Muslimin a single Muslim party in
Russian Empire. In 1906, Huseynzade started publishing the magazine ''
(Fusion
), financed by the famous philanthropist Haji Zeynalabdin Taghiyev, and harshly criticized the Tsarist government in his writings. Füyuzat
was a journal influenced by the Ottoman Servet-i Funun and served as a platform for advocating modernization in Azerbaijani culture. In its pages, the slogan Turkify, Islamize, Europeanize
(Türkləşmək, İslamlaşmak, Avropalaşmaq)'' was openly promoted, a phrase later popularized by
Ziya Gokalp, which became central to the development of Turkism in the
Ottoman Empire. Huseynzade urged Muslim Turks to "embrace the Turkish lifestyle, practice their faith in accordance with Islam, and adopt the modern European way of life" with this slogan. Ali Bey Huseynzade was also the director of the Saadet school. After the March 31 incident of 1909, when
Abdul Hamid II was exiled to
Salonica, Huseynzade was invited to Istanbul by his friends in the
CUP. Prior to his departure from
Russia in December 1910, Huseynzade visited his hometown of
Salyan for a week to say farewell to his family and neighbors. Huseynzade arrived in the
Ottoman capital in 1910, where he began working as an instructor at the Ottoman Medical College. In addition to his work as a doctor and teacher, he also became involved in various intellectual and literary projects organized by figures like
Akchura and
Aghaoglu. During the Unionist era, Huseynzade contributed articles to
Türk Yurdu and other
Ottoman newspapers and journals. He also participated, alongside
Akchura and
Aghaoglu, in activities on behalf of the
Ottoman government during wartime. From 1915 to 1916 he travelled to several European capitals to reach out for support for the Pan-Turkish movement. In 1916, Huseynzade and
Aghaoglu, who were active in the Committee for the Defense of the Rights of the Muslim Turco-Tatars in
Russia, signed memoranda and appeals calling on the Central Powers to defend the rights of Russian Muslims during the peace treaty negotiations. The Turkish thinker
Hilmi Ziya Ulken, who personally knew Huseynzade, wrote the following while describing Ali Bey Huseynzade’s activities during this period:
Between 1910 and 1918, he was one of the most devoted members of the Committee of Union and Progress. At the Türk Ocağı, he regularly gathered young people through conversations and exhortations, taking the lead in nationalist movements alongside Gokalp. However, he was neither as productive as Gokalp in adapting his ideas to the course of events nor as sharp-witted as Akchura. Due to his reserved nature and unpretentiousness, his influence was not on the masses but on thinkers.In 1913, he was a member of the Caucasian Turks Education Society in Istanbul, in 1916, he served on the High Health Council, and he was also a member of the General Center of the Turkish Hungarian Friendship Society. Alongside
Akil Muhtar and Nesim Muslih, he was sent to the
International Socialist Congress in
Stockholm, held in 1917. After the fall of
ADR in April 1920, Huseynzade permanently settled in
Turkey and became a citizen, receiving the surname, Turan. Huseynzade participated in the
First All-Union Turkological Congress held in
Baku in 1926, leaving behind notes related to this congress. Ali bey Huseynzade's public career came to an end after he was suspected of being involved in a conspiracy to assassinate
Mustafa Kemal in 1926. Although he was found innocent, his political career was effectively over. In 1933, he retired from his position at
Istanbul University. Huseynzade continued to write his memoirs about the early Republican heroes. In 1940, while having a conversation with a doctor friend about Britain's policy in
India, he suffered a heart attack and died at the age of 76. ==Legacy==