Checks and Balances because one branch keeps the other one in check
Japan experienced many new positive things because it started becoming more modernized after a long period of seclusion. Of course, some conservative people were against this western influence and rebellions ensued, but it was eventually all solved.
No it did not alter the war on the Allie’s side. Many of the soldiers felt petty and sorrow for the people in the death camps but militarily wise the air force knew of the death camps and could of bombed certain facilities in the death camps to disturb and save lives but they wanted to save there logistics and focus them on the war effort
The Mongols had a benevolent attitude toward foreign religions, or at least a policy of benign neglect. Their belief in Shamanism notwithstanding, the Mongols determined early on that aggressive imposition of their native religion on their subjects would be counter-productive.
You need a republic because it is seen in a form of protecting the citizens’ rights and preventing as state form becoming a dictatorship