Martin Luther King called for a guaranteed minimum standard of living for all Americans; a generation later, our political leaders have presided over a bipartisan retreat from this country’s social contract with its most vulnerable citizens. King called for a broad-based movement against bigotry, militarism, and economic injustice; a generation later, the left remains beset by the divisions he worked to overcome, and by the ones he himself failed to critically engage. King called for an audacious, visionary struggle to win the seemingly unachievable; a generation later, we spend much of our energy working to protect what’s been won against further erosion. There was a time when the FBI called King the most dangerous Negro in America. It’s time King was dangerous again.