Intergrated but uneqaul
After slave labour, americans found itself with a problem of intergrating blacks into the system, but the main headaches after 1920's was the question of equality, that led to emergence of rigorous activism.
Kiev is the answer, but fun fact, Kiev is no longer part of Russia.
Most noticeably would be the insane developments in organized crime, as so many people illegally went to and created speakeasies.