"The Decline of the West" is the cultural philosophical main work of Oswald Spengler. In his book, he outlines the panorama of a history philosophy that is specific to him. It reflects the experiences of the time before and during World War I and is particularly inspired by the revolutionary circumstances of the era. As a philosopher, he recommends looking at the historical forms of millennia if one truly wants to understand the great crisis of the present. This is Volume 1 of 2.