The main purpose of the freedman's bureau was to

to provide food, shelter, clothing, medical services, and land to displaced Southerners, including newly freed African Americans.The main goal of the Freedmen's Bureau was to help freed slaves and other people displaced as a result of the Civil War. The Freedmen's Bureau...

On March 3, 1865, Congress passed “An Act to establish a Bureau for the Relief of Freedmen and Refugees” to provide food, shelter, clothing, medical services, and land to displaced Southerners, including newly freed African Americans.

the two colonies had the earliest laws mandating religious tolerance.

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: