2000 Great Songs #1414: Ma

How many 17-minute 2-chord vamps does a Top 2000 really need? Well, apparently two (so far). Detroit's Rare Earth, one of the few all-white acts on Motown, had already released some fantastic (and underrated) R&B albums in the late 60s and early 70s when they decided to go all in on some absurdly over-the-top funk. For the title track of 1973's Ma , they took a basic two-note bass riff and…