"The Myth of the Twentieth Century" is a book written by the German philosopher and political theorist Alfred Rosenberg in 1930. It presents a worldview that emphasizes the importance of race and culture, arguing that the 20th century is defined by a struggle between different racial groups. The book became influential in Nazi ideology, promoting ideas of Aryan supremacy and anti-Semitism. Rosenberg's work critiques modernity, liberalism, and Marxism, suggesting that these ideologies undermine traditional values. He advocates for a return to a more spiritual and racial identity, which he believes is essential for the survival of the German nation. The book has been widely criticized for its extremist views and historical inaccuracies.