One reason Renaissance art looks more lifelike than Medieval art is that it uses classical influences. Rather than being bogged down by religious dogma artists were free to explore the human and the secular through their art which led to a rebirth of classical methods of creating art.
Yes, If Adolf never ordered his army generals to prepare to treble the size of his supply for 300,000 men. The german military could have not expanded. Causing the holocaust to never happen.
