What makes a great country song? It tells a story. It draws a line. It has a twang you can feel down to the soles of your feet. Some get mad, some get weepy, some just get you down the road. But these are 100 essential songs that map out the story of country music, from Hank Williams howling at the moon to George Jones pouring one out for all the desperate lovers to Taylor Swift singing the suburban cowgirl blues.