Question

why there are more federal countries in the world

Answer 1

There are more federal countries in the world because federalism has a number of advantages like,

In federalism, there is respect for diversity and for every system.

There are democratic politics to help the country flourish.

Thirdly, the constitutional provisions are very clear in the system of federalism. 

Answer 2

Answer:

Of the eight largest countries in the world by area, seven—Russia, Canada, the United States, ... Even within more formal political systems, traces can still be found of its influence.