- - Common interest help to unify the many different people.
Answer:
They followed the laws that's why they survived and some hided.
Because of pollution and over hunting
The pair of leaders that used political purges including the killing of opposition groups as a means of maintaining control of the government were Joseph Stalin and Mao Zedong. Stalin was the communist leader in Russia and Mao Zedong was another communist leader from the country of china. I hope it helps you.
