In what way did the american a revolution affect other countries?

First, the American Revolution was just one in a series of costly wars for France which ultimately bankrupted the country and toppled the Bourbon dynasty there.  The American Revolution also affected Spain and the Netherlands in the sense that war profiteers benefited from the Revolution.  The American Revolution inspired other revolutions in Haiti and France where the people sought to rise above their oppressors.  In the 1840s Europeans sought liberal reforms based on the ideals of the American Revolution this revolution inspired the idea that government of the people was ideal.  

an era of negotiation.

is that an answer to your question?

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.