In the 1840s, the term Manifest Destiny was used by many Americans to justify

The phrase “manifest destiny” suggested that expansion across the American continent was obvious, inevitable, and a divine right of the United States. Manifest destiny was used by Democrats in the 1840s to justify the war with Mexico.

1. government controls industry through policy

2.government is both a consumer and a producer

4. government can use policy t influence economy

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the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.