When a countries economy is strong it makes the country powerful, countries with low economy always find themselves borrowing from countries with stronger economy and there by making such country or nation subject to the nation with stronger economy.
Those countries with strong economy controls the world's political and religion system.
In other for a country to grow in all area's, it's major focus should be growing her economy, when this is achieved then that nation will become one of the most powerful nations in the world.
United States, China, Russia and Germany. This aforementioned nation's are seen as the most powerful nations of the world they all have a strong economy, strong economy is the beginning of a powerful nation.