<p>
[quote]
"Since the dawn of time, human beings have been on a relentless pursuit of ever improving, changing, and fixing. It was not, however, until the last hundred years did changes that can drastically modify the human life take place. "
[/quote]
</p>
<p>This could use some reworking. I think it's a tense issue. You have man since the dawn of time working in the present tense in the first sentence. In the second sentence you disuss changes "that can drastically modify". It's an event in the past, it's better to say "changes that drastically modified" human life. Getting this right is more important than adding on superfluous vocabulary.</p>
<p>I'd strongly suggest finding some historical version of your three literary references. Pick three historical movements which had social or economic effects and learn the basics so that you can apply them in an essay. This doesn't have to be an AP History type level of knowledge, just enough to make a passing reference which is appropriate. It seems that as long as it's not grossly wrong you won't be marked down for not being perfectly correct.</p>