Can you guess what this poem is talking about?!

Can you guess what this poem is talking about?

The following are a couple of verses from one of my favorite poems. Can you guess what the poem is talking about?
If you have other ideas that would fit this description it would be interesting. No cheating!!!

Armies trample, invade, destroy,
With guns roaring from earth and air.
I am more terrible than armies,
I am more feared than the cannon.

Kings and chancellors give commands;
I give no command to any;
But I am listened to more than Kings
And more than orators.

I am first and last to be felt of the living.
I am .......

3 weeks ago
Interesting ideas. I will give the answer after a
while

pain maybe??