Karl Mannheim – Karl Mannheim (March 27, 1893 – January 9, 1947), or Károly Manheim in the original spelling, was a Hungarian-born sociologist, influential in the first half of the 20th century and one of the founding fathers of classical sociology as well as a founder of the sociology of knowledge. He is most known for his book Ideology and Utopia published in 1929 where he argues that ideologies are the true nature of any given society and in trying to achieve utopia, these ideologies affect theories of philosophy and even history.

Karl Mannheim – Wikipedia

https://en.wikipedia.org/wiki/Karl_Mannheim

Karl Mannheim (March 27, 1893 – January 9, 1947), or Károly Manheim in the original spelling, was a Hungarian-born sociologist, influential in the first half of the 20th century and one of the founding fathers of classical sociology as well as a founder of the sociology of knowledge. He is most known for his book Ideology and Utopia published in 1929 where he argues that ideologies are the true nature of any given society and in trying to achieve utopia, these ideologies affect theories of philosophy and even history.