[Flash]

All right, I thought about the use of direct questions while writing the essay and eventually decided to leave them. Do you like the following changes?
Nowadays education is one of the most important subjects to discuss. Let us try to find out why education is so important and why parents call upon their children to receive a decent education.

About the conclusion:
OK, I'll change it in the way you showed but I'd rather use widely, generally than universally.

BTW, I managed to find a stylistic mistake in my essay before posting it here. I first wrote: ...crucially depends on what kind of people works... but then opened my English dictionary and discovered that it was a British slang word the use of which, I think, is quite inappropriate in my essay.