Russia is the most like one because they are always starting wars.
Because of its wheat production.
It divided them because the Greek city states were all proud of their own culture, traditions and heritage. This led to many internal conflicts and struggles. At the same time, however, in times of need when there was a strong outside force (Persian empire for example), they joined together as their culture and values bonded them together to fight a common enemy.
Why did Herbert Hoover's policies fail to solve the country's economic class? Because the crisis deepened and he struggles to respond to the Great Depression.
Black sea and Pacific Buddy!