Expert Voices

Conservation's Biggest Challenge? The Legacy of Colonialism (Op-Ed)

During Belgian colonial rule in the Congo (1908 to 1960) elephants were killed for sport or ivory.
(Image credit: Photo12/UIG/Getty)

Species appear and disappear in the blink of a geologic eye; that's a rule of life. There have been five mass extinctions in Earth's past, when changes to the climate, the emergence of new adaptations and even cosmic interventions caused many unique life-forms to die off. A sixth mass extinction is currently underway, and the only thing that distinguishes it from its predecessors is the cause: humans.

Why are so many of Earth's species going extinct? The reasons are myriad and include loss of habitat, overhunting and competition with non-native species that were introduced by people. But how did we get to this point, so soon after an era in which the world's bounty seemed endless, with flocks of passenger pigeons so large that they covered the sun and herds of bison that numbered in the thousands?

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Ecologist at Pennsylvania State University