Marx wrote more than Capital. Yet, insofar as Capital is acknowledged as the pinnacle of Marx's theoretical work, what is outside it invariably is viewed as of lesser theoretical importance — even when it is acknowledged that Marx completed neither Capital nor the other works in his Economics that he envisioned. There are real problems in studying Capital as if it stands by itself. As noted in Chapter 5, Marx's work outside Capital suggests that he retained his early conception of capitalism as a whole — a conception encompassing the sides of both capital and wage-labour and their interactions. The fact, however, that Capital does not explore the side of wage-labour and those interactions has meant that the Marxism that uncritically rests upon it shares its one-sidedness.