The Importance of Clear Cut Threshold Issues

Richard Tuck says we can't give a general account of where, there is the equivalent of a threshold. We have a reason to act in an environmentally sound way if and only if other people are prepared to act in a similar way themselves. Human nature is such that we often don't do what it's rational for us to do but at least we're not insulting our co-heresing by telling them they are eminently clearheaded and rational - he adds.