 Macro-level history is possible as well. William McNeill provides a history of the world’s diseases (McNeill 1976); Massimo Livi-Bacci offers a history of the world’s population (Livi-Bacci 2007); and De Vries and Goudsblom provide an environmental history of the world (De Vries and Goudsblom 2002). In each of these cases, the historian has chosen a scale that encompasses virtually the whole of the globe, over millennia of time. These histories can certainly be called “macro-history.”