Of Mushrooms and Method: History and the Family in Hobbes’s Science of Politics

Hobbes’s account of the commonwealth is standardly interpreted to be primarily a theory of contract, whereby the archetypal manner of forming a political community is via an act of mutual agreement between suspicious individuals of equal power. By examining Hobbes’s theories of the pre-political family, and what he says about the role of real history in the development of political societies, I conclude that this standard interpretation is untenable. Rather, Hobbes’s conception of commonwealth ‘by institution’ is a hypothetical model used to illustrate the mechanics of sovereignty, and to reconcile men to the conditions of subjection to absolute political power. In practice, all sovereignty is originally by ‘acquisition’. Realizing this casts serious doubt on the possibility that Hobbes is a fundamentally democratic thinker. In turn, we are invited to reconsider the history of political thought after Hobbes, in particular by seeing his theory of the family and of history as a genealogical ancestor of Scottish Enlightenment political theory.This work was supported by The Arts and Humanities Research Council block grant, and the University of Cambridge Faculty of History Prince Consort & Thirlwall Trust.This is the accepted manuscript version. The final version is available from http://ept.sagepub.com/content/early/2014/04/21/1474885114531237.abstract

Elevational and local climate variability predicts thermal breadth of mountain tropical tadpoles

The climate variability hypothesis posits that increased environmental thermal variation should select for thermal generalists, while stable environments should favor thermal specialists. This hypothesis has been tested on large spatial scales, such as latitude and elevation, but less so on smaller scales reflective of the experienced microclimate. Here, we estimated thermal tolerance limits of 75 species of amphibian tadpoles from an aseasonal tropical mountain range of the Ecuadorian Andes, distributed along a 3500 m elevational range, to test the climatic variability hypothesis at a large (elevation) and a small (microhabitat) scale. We show how species from less variable thermal habitats, such as lowlands and those restricted to streams, exhibit narrower thermal tolerance breadths than highland and pond-dwelling species respectively. Interestingly, while broader thermal tolerance breadths at large scales are driven by higher cold tolerance variation (heat-invariant hypothesis), at local scales they are driven by higher heat tolerance variation. This contrasting pattern may result from divergent selection on both thermal limits to face environmental thermal extremes at different scales. Specifically, within the same elevational window, exposure to extreme maximum temperatures could be avoided through habitat shifts from temporary ponds to permanent ponds or streams, while minimum peak temperatures remained invariable between habitats but steadily decreased with elevation. Therefore an understanding of the effects of habitat conversion is crucial for future research on resilience to climate change