During the isolation, they managed to create a distinct cultural identity and a society that reflected their values because they did not have anything from foreign lands to affect their beliefs. They eventually met economic problems which led to the end of the isolation period and the country entered the Meiji restoration.
B Calhoun i just asked google
The causes of the Great Depression were over speculation, over plating by farmers which made crop prices go down, people were over borrowing credit and not paying it, and people were also taking out loans and not paying those back
It means to not only think of your own interest but also to the interest of others.