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Archaeological and paleoecological investigations of Neolithization processes in Southern Primorye (or the Maritime Region) of the Russian Far East are generating new insight into the complex interactions between human populations and the natural environment during the Middle Holocene. Dynamic coastal and terrestrial ecosystems have been linked to transformations in the paleoeconomy and social structure of prehistoric societies that gave rise to the Boisman Neolithic culture (7500–4500 BP) of coastal hunter-fisher-gatherers. These human–environment relations are reconstructed in the current paper, drawing from a wide range of available evidence.  相似文献   
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This article deals with the question of the relationship between the Italian Communist Party (PCI), the strategy of ‘riforme di struttura’ and reforms in Italy between the 1960s and 1970s, with particular reference to the construction of a modern welfare system. The goal of a universal social security system was set by the PCI from at least 1956. Later, the dialectic with the centre-left governments induced the Communists to strengthen and articulate their proposals on welfare, linking them to the overall design of an advanced democratization of the state and society. In the 1970s, and in particular during the ‘solidarietà democratica’, various proposals made by the Communist Party and the CGIL (Italian General Confederation of Labour) in previous years finally became law, beginning with the establishment of the National Health Service organized into local health units. The Communist Party insisted on performance quality rather than quantity. However, the welfare state is now suffering difficulties throughout the Western world.  相似文献   
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Abstract

Niche construction theory, a branch of evolutionary biology, places emphasis on the capacity of organisms, through their metabolism, activities and choices, to modify natural selection in their environment and thereby act as co-directors of their own evolution as well as that of others. Humans are potent niche constructors, and understanding how niche construction regulates ecosystem dynamics is central to understanding the impact of human populations on their ecological and developmental environments. A classic example is provided by the evolution of dairying by Neolithic groups in Europe and the significant role played by storage in the development of the dairying niche.  相似文献   
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