 The second step was to argue that any attempt to analyze free will in a way that putatively captures a deeper or more robust sense of freedom leads to intractable conundrums. The most important examples of this attempt to capture a deeper sense of freedom in the modern period are Immanuel Kant (1781 [1998], 1785 [1998], 1788 [2015]) and Thomas Reid (1788 [1969]) and in the early twentieth century C. A. Campbell (1951). These philosophers argued that the above compatibilist analyses of the freedom to do otherwise and self-determination are, at best, insufficient for free will, and, at worst, incompatible with it. With respect to the classical compatibilist analysis of the freedom to do otherwise, these critics argued that the freedom to do otherwise requires not just that an agent could have acted differently if he had willed differently, but also that he could have willed differently. Free will requires more than free action. With respect to classical compatibilists’ analysis of self-determination, they argued that self-determination requires that the agent—rather than his desires, preferences, or any other mental state—cause his free choices and actions. Reid explains: