People make me, save me, change me, raise me. What am I?

Look out your window to solve this riddle. A little further, almost there, oh noooooooo.

I am an American poet of quite some renown. Surprisingly I am also a bridge leading to a brotherly town. My magnum opus should be read on an emerald lawn, though if you don’t like free verse you will find it a yawn. My first I share with the man who created the world’s most famous mouse, my second with chocolate you might sample in your own house.

You don't like me but you need me, sure as can be. For you would be a reckless daredevil without me. I keep you in check and help you see reality. Sometimes though, I come upon you irrationally. I can make you wither by the hour. Please know that I can be conquered by pure willpower.

You see me when a storm comes in, and when I leave, my name describes how quickly I go. I always come with an echo, although the echo can be near or far. One can tear everything apart but I am also used to hold things together. What am I?