The general thinking is that a law is unjust if it doesn't square with natural law. This is certainly the view that was put forth in Martin Luther King's Letter from Birmingham Jail.
So, a law that was passed that treated people differently wouldn't square with the natural law that all humans are equal. And thus, one would have the obligation to disobey that law.
From 1300s to 1500s, which is about two centuries, Japan tore itself apart in the feudal wars and all the civil conflicts. Due to Minamoto's victory, Japan transitioned to medieval feudalism and power rested upon two shogun regimes, the Kamakur and Ashikaga.
Answer:
If President Lincoln hadn't been assassinated, I believe that Reconstruction and the post-war era would have been more historically positive and ambitious. I think Lincoln would have achieved more things politically and socially for America, and would have done more to fight against many injustices in this country. Andrew Johnson did not have a positive presidency, says his impeachment. Lincoln had plans, but Andrew Johnson created policies and actions that went against the Republican Party and angered many, like his pardoning of Southerners. Lincoln would have continued to be a great figure for his party and I believe would have provided more as leadership than Johnson. If he was not assassinated, I believe that Lincoln would have continued his legacy and his fight for justice in America.
