What is the main conflict in Live and Let Die by Ian Fleming?

Secret Agent James Bond is on a mission to stop gold coins from being smuggled out of Jamaica. The pirate treasure is being smuggled by a Harlem gangster known as Mr. Big, a man from Haiti who uses voodoo to control a large African American community around the United States. Mr. Big uses the gold to fund SMERSH, the evil Soviet agency that is Bond's arch-nemeses.