The book by Tom Clancy has different kind of villains
'main character Jack Ryan, who is now the Deputy Director of Central Intelligence, tries to stop a crisis concerning the Middle East peace process where Palestinian and former East German terrorists conspire to bring the United States and Soviet Union into nuclear war.'
https://en.wikipedia.org/wiki/The_Sum_of_All_Fears
His other book Rainbow Six has even more interesting plot:
'Rainbow Six explores the issue of radical environmentalism. According to Marc Cerasini's essay on the novel, the philosophy of the antagonists are considered as an extreme form of naturalism, based on Jean-Jacques Rousseau's view that society's functions corrupt mankind and that "a natural or primitive state is actually morally superior to civilization"..... a biological weapon being used to end the human race, mad scientists plotting world domination, and high-tech secret bases hidden from civilization. However, Clancy makes the plot realistic by basing the motivations of the eco-terrorists on real-life radical environmentalists.'
https://en.wikipedia.org/wiki/Rainbow_Six_(novel)