This special issue of Culture, Theory and Critique recognises the growing centrality of the environment as a theme that cuts across and weaves through multiple disciplines. Scholars working within the fields of anthropology, history and literature have come together to present research on invisible harm, a term used here to capture the broad effects of increasing environmental toxicity and contamination in specific late capitalist contexts. Taken together, the articles suggest that it is the unseen nature of toxicity that enables the state to authorise its existence, whether the nuclear-era waste in a remote area of Kazakhstan that can be seen only with a Geiger counter (Stawkowski), the toxic oil pits hidden throughout Ecuador's Amazonian jungle (Ofrias), the lead seeping into the soil from a metals smelter plant in Uruguay (Renfrew), or the radio waves that emanate from a secret US military facility (Jacobs). Secrecy, too, is a theme that emerges in these cases. Our authors each demonstrate the ways that the invisibility of toxicity is deceptive, outlining very real material effects that include not just damage to life and to the environment, but also the formation of new subjectivities organised around toxic harm. These effects, as enabled by invisibility, are the focus of this special issue. A temporal dimension permeates the things we cannot see. Toxicity may be invisible now but it will not be so tomorrow. For example, most scientists now agree that while exposure to chronic low-dose ionising radiation may not produce immediate health effects in a given population, this exposure will over time contribute to an increase in the number of cancers. But the temporal gap between emission and harm secures the tabling of environmental concerns at both the local and national levels. State actors clearly have interest in taking on at least the appearance of combatting future harm for their populations but they may choose to ignore long-term issues and instead embrace the benefits that neoliberalising and other present-oriented developmentalist approaches promise. These articles therefore ask how approaches based in immediacy may speak to the potential for environmental damage and bodily harm. Neoliberalism, whether characterised as 'roll-back' in terms of health care or 'roll-out' in terms of authorising particular directions for scientific research (Peck and Tickell 2002), carries particular valuations of health and illness and thus of life and death (cf. Agamben 1998; Lemke 2001; Foucault 2008). Even if states are invested in curtailing future harm, the science that might enable this direction (and necessarily shake the status quo) often remains 'undone' (Frickel et al. 2010; Hess 2016), making it extremely difficult to link health effects to toxicity. States affect the direction of scientific inquiry through political and economic means,