Liken, equivalent, equate
Yes. Virtually anything can be the theme of an essay, as long as you can find enough information about it to write enough paragraphs to be considered an essay.
The best example I can think of Bush (former president of the U.S) proclaimed after 9/11 that you (who would be watching his speech) are either with us or against us. Either, you are for America or you like terrorism. To avoid it, think about it first then relate it to you, believe whatever you want. While I was young when this was happening, now I proclaim that I agree with neither. I know how horrible it was but I don't believe in going to war for it.
Everyday life and common subjects.
Anna:- Oh my gosh! These dinosaur bones are absolutely spectacular.
Stephanie:- I’ve been waiting to come here for so long. This is amazing! Look over there, it’s the fossilized eggs of a Tyrannosaurus rex.
Anna:- Let’s go closer.
Stephanie:- Not too close. We don’t want to hatch and think we are the parents!
Anna:- That’s not even possible, Stephanie.
Stephanie:- Are you sure? I’m a bit skeptical.
Anna:- Yes, I’m very sure.
Stephanie:- ...well, if you say so. But if it hatches, I’m blaming it on you!
I hope that helps.
