The single country with the world's largest GDP ___ is The member countries of the European Union have
about the same GDP as
Together, these four countries and the European Union
have___
half of the world's total GDP

Correct answers on edge2020
The u. s.
The u. s.
More than

The single country with the world's largest GDP is ✔ the US .

The member countries of the European Union have about the same GDP as ✔ the US .

Together, these four countries and the European Union have ✔ more than half of the world's total GDP.

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: