What is one disadvantage of natural barriers

Isolation.

Explanation:

One disadvantage of natural barriers is isolation. For example, if a group of people are living on an extremely small island in the middle of the Pacific Ocean, with lacking resources and a non-sturdy dinghy boat, the Pacific Ocean is serving as a natural barrier that isolates the group of people. Due to their lacking resources and nearly non-existent means of escape, this isolation is not at all beneficial.

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:

where are the statements?