Baron de montesquieu’s the spirit of the laws changed the nature of government by providing the ideas of

  The constitutional system of government with separation of powers.

Explanation:

  It was a treatise on a political theory published in 1748. It was first published anonymously because Montesquieu´s works were censored. The work was rapidly translated into several languages and influenced the work of many others.

  He pleaded for a Constitutional system of government with separation of powers into branches to be restrained by each other. He also wanted the preservation of legality and civil liberties, and the end of slavery.

  I hope this answer helps you.

c, because the american revolution was from 1765 to 1783.