Question

Which Founder and author of the Federalist Papers is best known for arguing that ""factions"" would play an important and useful role in American politics?

Answer 1

James Madison argued about factions in the federalist papers #10

Answer 2

Taking into account the statement above: "Which Founder and author of the Federalist Papers is best known for arguing that ""factions"" would play an important and useful role in American politics?"

The answer is: James Madison.

Hope this helps.