George Monbiot, an English writer known for his environmental and political activism, once expressed deep antipathy to the nuclear industry. He finally rejected his later neutral position regarding nuclear power in March 2011. Although he "still loathe[s] the liars who run the nuclear industry", Monbiot now advocates its use, having been convinced of its relative safety by what he considers the limited effects of the 2011 Japan tsunami on nuclear reactors in the region. Subsequently, he has harshly condemned the anti-nuclear movement, writing that it "has misled the world about the impacts of radiation on human health ... made [claims] ungrounded in science, unsupportable when challenged and wildly wrong." He singled out Helen Caldicott for, he wrote, making unsourced and inaccurate claims, dismissing contrary evidence as part of a cover-up, and overstating the death toll from the Chernobyl disaster by a factor of more than 140.