Why were the portuguese venturing into the atlantic ocean? they were in competition with spain to discover and conquer the most land in africa and the americas. having finally expelled the muslim moors from iberia, they sought to expand their borders as a means to protect their lands. they wanted to reach the sources of gold, ivory, and enslaved people that muslim merchants transported. they were convinced by prince henry the navigator, who wanted to put to use new tools and techniques for navigating great distance

answer; /// i believe that the correct answer is (divison of labor);

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: