Complex sentence: The Cold War and its events have left a significant legacy, and it is often referred to in popular culture, especially in media featuring themes of espionage (such as the internationally successful "James Bond" film series) and the threat of nuclear warfare.
Split into simpler sentences: The Cold War and its events have left a significant legacy. It is often referred to in popular culture, especially in media featuring themes of espionage (e.g. the internationally successful "James Bond" movie franchise) and the threat of nuclear warfare.