 Marx’s third argument depends on an empirical claim that utopian plans and blueprints are unnecessary, because satisfactory solutions to social problems emerge automatically from the unfolding of the historical process without themselves needing to be designed. The basic argument runs as follows: that utopian blueprints describe the basic structure of the socialist society of the future; and that such blueprints are necessary if and only if the basic structure of future socialist society needs to be designed. However, given that the basic structure of the future socialist society develops automatically (without design assistance) within capitalist society; and that the role of human agency in this unfolding historical process is to deliver (not design) that basic structure, Marx concludes that utopian blueprints are redundant. Reasons for resisting this argument include scepticism about both Marx’s reasoning and the empirical record. Marx is certain that humankind does not need to design the basic structure of the future socialist society, but it is not really made clear who or what does that designing in its place. Moreover, the path of historical development since Marx’s day does not obviously confirm the complex empirical claim that the basic structure of socialist society is developing automatically within existing capitalism, needing only to be delivered (and not designed) by human agency.