I know what all the fighting was for

The original version of this song is really just something to behold: it starts with a chugging banjo line with a cracking snare drum, then a little accordion, and then that all stops so a plaintive acoustic guitar can accompany the verses. Then, it all kicks back in again after the line "I'm not angry anymore," to complement her feeling of letting go.
This version, recorded live at Carnegie Hall in 2002, sticks with the plaintive guitar, and it still really works. This is one of my favorite Ani DiFranco songs, and I think it shows what an excellent songwriter she is. She obviously has billions of fans, so I wouldn't call her generally "underappreciated," but I do feel like her songwriting gets overlooked. She's clever, funny and just very good at what she does.
This comes from the recently released Carnegie Hall - 4.6.02, part of her "official bootleg" series of solo shows. I've never seen her live, just heard her great live record Living In Clip, which features a band. So a whole record of DiFranco performing solo is novel to me, and it brings out the best - and, during her rambling stories and excessive wailing - her worst.
But this record is good, and I recommend picking it up. It has her eight-minute spoken word poem "Self Evident," about September 11, which I haven't tackled yet because I'd like to give it a good listen.
This is the first of the bootleg series available in stores, but ytou can also buy Carnegie Hall - 4.6.02 from Ani's website.