How did the pattern of constitutionalism, emerging from the American and French Revolutions, affect the course of events in the Western world during the first half of the nineteenth century?

The both nations France and USA called for unity to replace the old monarchy system of government, which lead to the civil war in France, fighting against the monarchy , economic struggle, and equal rights

Explanation:

The following events lead both countries to revolt against the Current system at that time. which are as follows.

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.

i believe the answer would be 1.