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.
A healthy economy also gives some power to a country, but in terms of world power play your artillery and fire power also plays a key role.
The United States of America are seen as world power because they have a very healthy economy and enough arsenal to defend her territory.
Building a strong economy has to do with it national ideology and vision. However my country Nigeria for example, the country has all what it takes to build a strong economy, the man power, the resource but they're lacking the vision, leaders in this country do not see it as important building the national economy.
They tried to manipulate the resources in other to enrich themselves, whereby not thinking about national growth, if a country can have the vision of making it's economy stronger which is tough task but it's doable. The strong economy like the US, China, Russia and Germany we are referring to today was not strong 100 years ago but the vision of national growth was there, great men of the past came up with the vision to make it what it is today, which till this day leaders in this countries are still keying to that vision, So if countries with no economy can have the vision and put measures on ground, it is easy to work it out, it's just a Matter of time and you will build a powerful nation.