Explain how national boundaries can impede cultural interaction and economic exchange.

Based on the information in the graph, what can you conclude about humans in the world in general?

Whats the biggest sea in the world?

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion