How do copyrights and patents promote the progress of science and useful arts

What role did mazzini play in italian unification? a.) he dreamed of a united italy and took the first steps to achieving it. b.) he conquered the southern part of italy, including sicily. c.) he was the first leader of a united italy. d.) he was assassinated by the french government, making him a martyr.

When and why did the united states enter world war 2

How well does america today live up to the ideals of the declaration of independence?