Diogenes of Sinope was an ancient Greek philosopher and one of the most famous figures of Cynicism, known for his ascetic lifestyle and controversial behavior. He lived in the 4th century BCE and often challenged social norms and conventions, famously carrying a lantern in broad daylight to search for an honest man. Diogenes is best remembered for his wit, his disregard for material wealth, and his philosophical teachings advocating for a simple, self-sufficient life in accordance with nature.