in 2016 Islam was the major religion in Turkey comprising 82% of the total population, followed by religiously unaffiliated people, comprising 13% of the population, and Christians, forming 0.2%. Religious groups according to estimates: The vast majority of the present-day Turkish people are Muslim and the most popular sect is the Hanafite school of Sunni Islam, which was officially espoused by the Ottoman Empire; according to the KONDA Research and Consultancy survey carried out throughout Turkey on 2007: 52.8% defined themselves as "a religious person who strives to fulfill religious obligations" (Religious) 34.3 % defined themselves as "a believer who does not fulfill religious obligations" (Not religious). 9.7% defined themselves as "a fully devout person fulfilling all religious obligations" (Fully devout). 2.3% defined themselves as "someone who does not believe in religious obligations" (Non-believer). 0.9% defined themselves as "someone with no religious conviction" (Atheist). In 2018 KONDA released a new study : 51% defined themselves as "a religious person who strives to fulfill religious obligations" (Religious) 34% defined themselves as "a believer who does not fulfill religious obligations" (Not religious). 10% defined themselves as "a fully devout person fulfilling all religious obligations" (Fully devout). 2% defined themselves as "someone who does not believe in religious obligations" (Non-believer). 3% defined themselves as "someone with no religious conviction" (Atheist). Among those aged between 15 and 29 years old : 43% defined themselves as "a religious person who strives to fulfill religious obligations" (Religious) 45% defined themselves as "a believer who does not fulfill religious obligations" (Not religious). 5% defined themselves as "a fully devout person fulfilling all religious obligations" (Fully devout). 4% defined themselves as "someone who does not believe in religious obligations" (Non-believer). 4% defined themselves as "someone with no religious conviction" (Atheist). Census Census of 1927 1965 census Minorities Modern Turkey was founded by Mustafa Kemal Atatürk as secular (Laiklik, Turkish adaptation of French Laïcité), i.e. without a state religion, or separate ethnic divisions/ identities. The concept of "minorities" has only been accepted by the Republic of Turkey as defined by the Treaty of Lausanne (1923) and thence strictly limited to Greeks, Jews and Armenians, only on religious matters, excluding from the scope of the concept the ethnic identities of these minorities as of others such as the Kurds who make up 15% of the country; others include Assyrians/Syriacs of various Christian denominations, Alevis and all the others. There are