Currently it provides a hefty +4 +8 +12 % bonus to research, which IMO is extremely overpowered. Especially larger nations can see huge returns on farming 8 generals for passive XP gain from governing. I've been playing with passive XP off for a while now but still I'm over-hoarding RP% bonuses by turn 50 due to aggressive gameplay. Should it perhaps be nerfed to 2% each rank?