'America is a great country' is pretty much a cliche.

I would like to start this thread for everybody to post what in their view makes USA great.

My hope is that every poster would first put some thought into it, so that the response is not just a repeat of somebody's propaganda talking point, but something they are fairly convinced to be true.

For the sake of starting with some common ground, here is the 'American' definition of 'great'.
Quote Originally Posted by Merriam-Webster
Main Entry: 1great
Pronunciation: \ˈgrāt, Southern also ˈgre(ə)t\
Function: adjective
Etymology: Middle English grete, from Old English grēat; akin to Old High German grōz large
Date: before 12th century
1 a : notably large in size : huge b : of a kind characterized by relative largeness —used in plant and animal names c : elaborate, ample
2 a : large in number or measure : numerous b : predominant
3 : remarkable in magnitude, degree, or effectiveness
4 : full of emotion
5 a : eminent, distinguished b : chief or preeminent over others —often used in titles Great Chamberlain> c : aristocratic, grand
6 : long continued
7 : principal, main
8 : more remote in a family relationship by a single generation than a specified relative <great-grandfather>
9 : markedly superior in character or quality; especially : noble
10 a : remarkably skilled b : marked by enthusiasm : keen
11 —used as a generalized term of approval

Let's stick to 9, so that the thread is fairly well defined and I think that's the closest to the meaning of the phrase I started with.