Modeling the prehistoric arrival of the sweet potato in Polynesia

The sweet potato is a plant native to the Americas, and its pre-historic presence in Polynesia is a long-standing anthropological problem. Here we use computer-driven drift simulations to model the trajectories of vessels and seed pods departing from a segment of coast between Mexico and Chile. The experiments demonstrate that accidental drift voyages could have been the mechanism responsible for the pre-historic introduction of the sweet potato from the Americas to Polynesia. While present results do not relate to the feasibility of a transfer by purposeful navigation, they do indicate that this type of voyaging is not required in order to explain the introduction of the crop into Polynesia. The relatively high probability of occurrence and relatively short crossing times of trips from Northern Chile and Peru into the Marquesas, Tuamotu and Society groups are in agreement with the general consensus that this region encompasses the area of original arrival and subsequent dispersal of the sweet potato in Polynesia.     

The Violence of Poverty: Theology and Activism in an “Age of Austerity”

ABSTRACT

Faith groups are in the front line of the struggle to defeat poverty in breadline Britain. Given their roots in local communities Churches and Christian NGOs are well-placed to challenge economic policies that have resulted in the spiraling of food poverty, homelessness, personal debt and child poverty. By framing poverty as a political choice, a form of structural violence and systemic sin this paper brings peace studies and political theology into a constructive dialogue. In the face of ongoing “austerity” the paper demonstrates that poverty represents a clear and present danger to the social fabric of the UK and argues that only a re-imagined interdisciplinary theology of liberation can provide academics and activists with the tools needed to defeat systemic poverty and the cultural violence upon which it rests.