This article approaches the agency of displaced people through material evidence from the distant past. It seeks to construct a narrative of displacement where the key players include human as well as non-human agents-namely, the environment into which people move, and the socio-political and environmental context of displacement. Our case-study from ancient Italy involves potentially marginalized people who moved into agriculturally challenging lands in Daunia (one of the most drought-prone areas of the Mediterranean) during the Roman conquest (late fourth-early second centuries BCE). We discuss how the interplay between socio-political and environmental forces may have shaped the agency of subaltern social groups on the move, and the outcomes of this process. Ultimately, this analysis can contribute towards a framework for the archaeological study of marginality and mobility/displacement-while addressing potential limitations in evidence and methods.Humanities 2018, 7, 116 2 of 21 altered the spectrum of what was possible within the bounds of the law: in April 2017, they legalized their settlement, by turning their (originally) illegal occupation of private property into legal ownership through state intervention.However, the Catalyst cases-and the Dandara piece in particular-also draw attention to the fact that agency is about more than human volition-be it the volition of the powerful or that of the marginalized. The Dandara people moved into an environment that presents serious challenges. Although the settlement is within the city of Belo Horizonte (one of the largest in Brazil), it was originally built on land devoid of basic urban infrastructure such as sanitation, running water, sewage, power and gas lines. Additionally, it sits on a steep hill where the terrain is muddy and uneven; streets and alleys are unpaved and prone to landslides-especially during the summer months of torrential rainfall that characterize the subtropical humid climate of south-eastern Brazil. These are common problems facing Brazilian shantytowns in general, which tend to be far less organized than the Dandara settlement (see Nobre and Nakano 2017, this volume). Like Dandara, shantytowns tend to develop in areas that are beset with environmental hazards, such as pollution and risk of landslides and/or flooding (Rosa Filho 2012; see also Bras et al. 2016 on Haiti). These environmental constraints seem to have a bearing on the trajectory of marginal social groups, who usually lack the means to deal with environmental challenges as effectively as they might do, if they had modern technology and urban planning on their side.Human agents operate within existing social structures that both enable and constrain their actions also play a role in shaping the possibilities and limits of human agency (Crosby 1986;Barad 2007;Latour 2007). In a way, non-human elements-such as soil, terrain, climate, vegetation and fauna-also possess agency, in the sense that they can also contribute to the shaping and transformation of reality. These are force...