Daily Archives: January 30, 2019

Migration Theories: Stouffer’s Theory of Mobility

S.A. Stouffer, an American sociologist, introduced one such modification in the gravity model. Stouffer formulated his inter­vening opportunity model in 1940, and claimed that there is no necessary relationship between mobility and distance (Stouffer, 1940:846). Instead, the observed decline in … Continue reading

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Six Ways Human Activity Is Changing the Planet

THE DIRT Aral Sea, 1989 / Changing Planet.org Aral Sea, 2008 / Changing Planet.org Wired Scienceoutlined six ways in which humans are already geoengineering the Earth, arguing that the world has moved from the Holocene to Anthropocene era. “From diverting … Continue reading

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