Book excerpt: This book shows that polemical environmental and ecological debates are governed not so much by access to 'facts' as they are by the political ideology of the expert advancing a particular argument. Moreover, the thoughts of these experts tend to be based largely in just one of three competing streams of political thought: the left, the center, or the right. Drawing on social theory, the author explains the philosophical origins of this tendency to rely on just one of three traditions, and why this poses a serious obstacle to conceptualizing the cause, nature, and resolution of environmental problems.