So here's the question...

What DOES constitute a well-written protest song?

CSN&Y's "Ohio?"
Buffalo Springfield's "For What It's Worth?"
Mellencamp's "To Washington?"
Lennon's "Imagine?"
Marvin Gaye's "What's Goin' On?"
Springsteen's "Born in the USA?"
CCR's "Fortunate Son?"
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist