In 1972, after over 30 years of activism in the labor and communist movements, Allen shared the following strategic insight with a new generation of revolutionaries: “The most vulnerable point at which a decisive blow can be struck against bourgeois rule in the United States is white supremacy.  White supremacy is both the keystone (in the arch) and the Achilles heel of U.S. bourgeois democracy, the historic form of bourgeois rule in the US.  It is a vulnerable point because it is a historically developed and unresolvable internal contradiction of US bourgeois democracy.  It is the decisive vulnerable point because – as history has repeatedly proved – the basic class contradictions in bourgeois democracy can never fully mature until and unless the anti-proletarian nature of white supremacy has been completely established in the minds of the proletarian masses.”
Allen spent the next 20 years researching the primary sources and writing his magnum opus.