Please explain modernization and dependency theory

This is when your offspring insist on having a large fridge fitted into the kitchen, and then proceed to eat all of the food that you put inside.

When the changes in economic, social, cultural, psychological structures go togheter toward growth, differentiation, higher education, individualism. Every single country does the same path.
In opposite, the dependency theory says that the development of a country make the underdevelopment of another country. One leverages the other.