How modern do you intend to make it . . 1910, 1930 or 2006?
There has been a major shift in power from Europe to the Far East in that time. India and China are now major powers.
Have you considered putting it 50 years in the future when the world's population will be 10+ billion and, sure as hell, there will be conflict over oil, food, water and all other diminishing resources? Throw in some unavoidable global warming. To win, a player must reduce the global population to 1 billion. Definitely a bloodlust scen.
"I've managed to get to know one girl properly and she was just the same as all the rest"
Even before the first humanoid fell out of a tree and discovered that there was food on the ground, females have been learning at their mother's knee. The same message has been passed down for 100,000+++ generations, ensuring that they all march in lockstep.
P.S. I'm feeling very cynical today.