Secularism has a meaning beyond the constitutional principle in the Republic of Turkey. Secularism has been used as a means of controlling religion in Turkey and Turkey and as a principle for regulating religion-state relations that is the most troubled area of the Modernization/ Westernization period. The practice of secularism in the Single-Party era refers to a period in which secularism was applied the hardest, and after the end of the Single-Party rule, the first criticized issues have been the problems of applying the secularism issue and secularism. The main criticisms for the understanding of secularism, which took a step toward relative flexibility in 1947, began after the Democratic Party ruled and are still continuing today. Ali Fuad Başgil wrote a series of columns on secularism immediately following the elections that brought the Democratic Party to power, and explained his views on secularism. Being aware that secularism is at the beginning of the main social disagreements, Başgil aims to contribute to the reorganization of religion-state relations and the finding of a useful solution for society. Başgil’s sensitivity and views on secularism are discussed in the context of his views on freedom of thought and faith and his spiritual identity.