Earth System science (ESS) develops computer models of planetary dynamics using sets of partial differential equations. As humans have become recognised as a major determinant of Earth system change, the integration of lines of code that represent human history has become necessary. However, as yet, these representations have proven somewhat rudimentary and run into perennial concerns inherent to the human sciences. The introduction to this special issue addresses the recent history of integrating history and ESS and outlines a proposed counter-move: the historicization of Earth system modelling. Outcomes of this work are presented here. Moreover, in outlining past attempts at integrating history and ESS, we note some fundamental differences between these disciplines. Rather than disavowing integration, however, we call for ongoing and mutually respectful experimentation.