By meeting the challenges of the prairie's harsh climate and poor farming conditions, homesteaders eventually settled
50% of America's urban areas, or more than 10 million acres.
50% of America's West Coast, or 35 million acres.
20% of America's East Coast, or more than 5 million acres.
10% of all American land, or more than 270 million acres.

10% of all American land, or more than 270 million acres.

Explanation:

The Homestead Act of 1862 is one of the most important pieces of legislation in the history of the United States. Signed into law by Abraham Lincoln in the midst of the Civil War, this act would eventually result in the transfer of 270 million acres of public lands - or 10 percent of the area of the United States - to private individuals.

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:

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.