Friedrich Nietzsche’s philosophical beliefs, particularly his critiques of morality and religion, significantly shaped modern thought. Concepts such as the Übermensch and the declaration of “God is dead” challenge traditional values and encourage individuals to create their own meanings in life. His exploration of will to power and critique of absolute truths have influenced existentialism and postmodernism, advocating for a more subjective understanding of truth and morality. Nietzsche's ideas surrounding individualism resonate with contemporary discussions about authenticity and the necessity of questioning societal norms, making his work foundational for various philosophical movements.