Buffalo Springfield's time was short -- they formed in 1966 and split in 1968 -- but their legacy was vast. Some of their legend was cultivated in the ensuing decades, after founding members Richie Furay, Stephen Stills, and Neil Young went on to fame either on their own or with such groups as Poco and Manassas, but much of it rested upon "For What It's Worth," a protest song written and sung by Stills, that not only became their Top Ten breakthrough in 1967 but their enduring anthem, eventually serving as shorthand for all the political turmoil of the 1960s. So popular was "F...