History/econ or polisci/econ double major?

So I'm a sophomore in college and I'm trying to figure out which double major to do. My goal is to either work in an investment banking firm, but I'm also leaning towards working in the government as a diplomat or an ambassador. The problem is I don't know which double major to choose. I don't really like polisci because history is more interesting to me, but polisci would be better for the government. What should I do? Also, if my school had an international relations major i would choose that with economics, but they don't offer it. =( please help!