How did the outcome of the civil war change federalism, so that it became nation-centered rather than state-centered?

Federalism in the United States is the constitutional division of power between U.S. state governments and the federal government of the United States. Since the founding of the country, and particularly with the end of the American Civil War, power shifted away from the states and towards the national government. The progression of federalism includes dual, state-centered, and new federalism.

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explanation: we can only guess at how our actions may be perceived in the future. doing something really big like killing lots of people, saving lots of people, affecting the lives of lots of people is a sure fire way of being remembered in historical records. we can also make a difference in the history records by being a small influence on something bigger, whether that is as a civil servant, scientist or artist.

of course you could argue that we all affect history just as tiny cogs in a   bigger machine.

if you mean how do people influence our opinions of things which have already happened, then simply by writing a book which looks at things form a different perspective and trying to convince people that this perspective is more accurate or truthful. people do it all the time i.e. richard the third was a terrible or was he? plenty would disagree, it's just that their views aren't the most widely known.n: