Throughout history, only violent and catastrophic events have significantly cut inequality

Are mass violence and catastrophes the only forces that can seriously decrease economic inequality? To judge by thousands of years of history, the answer is yes, argues Walter Scheidel in this extract from his new book, The Great Leveller: Violence and the History of Inequality from the Stone Age to the 21st Century. Over thousands of years, only violent events have significantly lessened inequality. The “Four Horsemen” of levelling — mass-mobilisation warfare, transformative revolutions, state collapse, and catastrophic plagues—have repeatedly destroyed the fortunes of the rich

Does the Social Metabolism Drive Environmental Conflicts?

Increases in social metabolism drive environmental conflicts. This proposition, frequently found in the literature on ecological distribution conflicts, has stimulated much research at the interface of ecological economics and political ecology. However, under which conditions is this proposition valid and useful? This chapter briefly reviews the theoretical foundations underlying this proposition and discusses further socio-metabolic properties that may shape the dynamics of environmental conflicts. Furthermore, the chapter relates the socio-metabolic perspective to other 'grand explanations' of environmental conflicts, particularly, to the expansion of capitalism under a neo-Marxist perspective. The chapter argues that a socio-metabolic perspective has much to offer to understand some of the structural drivers of environmental conflicts. A socio-metabolic perspective links local environmental conflicts to the resource use profiles of economies as well as to global production and consumption systems, no matter whether these are capitalist societies, resource-intensive planning economies, autocratic monarchies, or illicit resource extractions occurring in the shadow economy. The chapter closes by recalling the need to integrate biophysical and social dynamics in a balanced manner for the nuanced study of environmental conflicts

Accumulation by development: The key role of poverty reduction narratives for resource capture in rural Cambodia

Indigenous shifting agriculture has been criticized for its negative effects on forest carbon stocks and mitigation policies have consequently fostered different forest management approaches. This has caused land disputes with indigenous populations in countries of the South, who have lost access to livelihood resources, finding themselves forced to c

Efficient Utilization of Fine-Grained Parallelism using a microHeterogeneous Environment

The goal of this thesis is to propose a new computing paradigm, called micro- Heterogeneous computing or mHC, which incorporates PCI (or other high speed local system bus) based processing elements (vector processors, digital signal processors, etc) into a general purpose machine. In this manner the benefits of heterogeneous computing on scientific applications can be achieved while avoiding some of the lim itations. Overall performance is increased by exploiting fine-grained parallelism on the most efficient architecture available, while reducing the high communication over head and costs of traditional heterogeneous environments. Furthermore, mHC based machines can be combined into a cluster, allowing both the coarse-grained and fine grained parallelism to be fully exploited in order to achieve even greater levels of performance. An existing high performance computing API (GSL) was chosen as the interface to the system to allow for easy integration with applications that were previously developed using this API. The ensuing chapters will provide the motivation for this work, an overview of heterogenous computing, and the details pertaining to microHeterogeneous comput ing. The framework implemented to demonstrate a microHeterogeneous computing environment will be examined as well as the results. Finally, the future of micro Heterogeneous computing will be discussed

A socio-metabolic perspective on environmental justice and degrowth movements

Unidad de excelencia María de Maeztu MdM-2015-0552Degrowth and environmental justice movements share overarching aims of sustainability and justice and pursue them through radical social change and resistances. Both movements are diverse and comprised of groups that originate and operate in different contexts. The ever-growing metabolism of the world economy presents an obstacle to both movements' aims, while a socio-metabolic perspective unveils very different characteristics and contexts of the specific struggles. The strategies of many environmental justice movements located at the frontiers of resource extraction are employed to resist coerced socio-ecological transition towards industrialization and to protect more customary ways of life. Movements for the degrowth of industrial metabolism tend to push for socio-ecological transformation, pursuing new ways of life and reimagined social relations in alternative societies. The overarching aims and obstacles of these movements may be shared, but their struggles, strategies and required actions are not the same. Alliances should seek advantages from this plurality of perspectives and positions within their struggles, while acknowledging potential tensions arising from these different contexts

Effects of Hemiparasites in Grassland Restorations Are Not Universal

Root hemiparasites infiltrate the vascular tissue of host roots to acquire water and nutrients, which often reduces host growth. Hemiparasites are postulated to be keystone species in grassland communities if they suppress dominant species and increase plant community biodiversity, and ecosystem engineers if they increase nutrient accessibility for surrounding species. We examined keystone effects by evaluating species richness and evenness in 1 m2 plots in a recent prairie restoration where Castilleja sessiliflora was naturally present or absent, and in a longer-established prairie restoration with or without Pedicularis canadensis. We examined ecosystem engineer effects by determining nitrate and phosphate concentrations under, 25 cm from, and 50 cm from hemiparasites, and in the center of hemiparasite-free plots. On the C. sessiliflora site, plots with the hemiparasites had higher species richness due to more forbs and higher floristic quality, consistent with the keystone species hypothesis. Soil phosphate levels were also greater in plots with C. sessiliflora present, consistent with the hypothesis of ecosystem engineering by this hemiparasite. In contrast, plots with/without P. canadensis showed no associations of any community metrics with the hemiparasite, and no correspondence between the presence of hemiparasites and soil nutrients. Although hemiparasites can increase grassland community heterogeneity, the effect is not universal, and the direction and strength of effects likely depends on local conditions

Self-sufficiency or surplus : Conflicting local and national rural development goals in Cambodia

Cambodia is currently experiencing profound processes of rural change, driven by an emerging trend of large-scale land deals. This article discusses potential future pathways by analyzing two contrasting visions and realities of land use: the aim of the governmental elites to foster surplus-producing rural areas for overall economic growth, employment creation and ultimately poverty reduction, and the attempts of smallholders to maintain and create livelihoods based on largely self-sufficient rural systems. Based on the MuSIASEM approach, the rural economy of Cambodia and different rural system types are analyzed by looking at their metabolic pattern in terms of land use, human activity, and produced and consumed flows. The analysis shows that the pathways of self-sufficiency and surplus production are largely not compatible in the long term. Cambodia's rural labor force is expected to increase enormously over the next decades, while available land for the smallholder sector has become scarce due to the granting of Economic Land Concessions (ELC). Consequently, acceleration in rural-urban migration may be expected, accompanied by a transition from self-employed smallholders to employment-dependent laborers. If the ELC system achieves to turn the reserved land into viable agribusinesses, it might enable added value creation; however, it does not bring substantial amounts of employment opportunities to rural areas. On the contrary, ELC have high opportunity costs in terms of rural livelihoods based on smallholder land uses and thus drive the marginalization of Cambodian smallholders