Oswald Spengler
Oswald Spengler (29 May 1880 – 8 May 1936) was a German philosopher and schoolteacher. He was mostly active in the areas of the philosophy of history,  and cultural history. He also had antidemocratic ideas. He was part of a group of people called Konservative Revolution. His main work, The Decline of the West (original: Der Untergang des Abendlandes), he is against telling the story of humanity as a linear story of advances and successes. Instead, he says that history is cyclic: new cultures arise, they are successful, and they vanish again. He also says that the different cultures are well-defined, and clearly distinguishable. One such culture usually has a "lifetime" of about 1.000 years. Even in the title of his work, he says that the culture of the West (he used the term Abendland, occident, in English),  is in decline.