This is a work of historical critical exegesis. It aims to establish the influence of the Science of Logic (SL) of G.W.F. Hegel on the Grundrisse of Karl Marx. It is the first work in the history of Marx Studies to demonstrate that the Hegelian logic guided Marx's doctrinal development, and that the ordering of the logical categories in the SL is reflected in the ordering of economic categories in the Grundrisse.