Film noir is a style of crime drama that became popular in the 1940s-1950s. It is known for its cynical worldview and emphasis on sexuality as motivations. These films typically featured flawed protagonists and femme fatale characters. They also had signature visual styles like low-key lighting, shadows, and Dutch angles that contributed to an overall dark and disorienting tone. Common noir themes included greed, jealousy, crime, murder investigations and betrayals. The urban setting of cities like Los Angeles and New York featured prominently in locations like bars and factories where climaxes typically took place. Narrative devices in noir often involved nonlinear techniques like flashbacks and voiceovers.