The global sustainability challenge is urgent, tremendous and increasing. From an ecological perspective, the current worldwide resource footprint requires approximately 1.5 planets to sustain existing life, and with current usage would require two planets by 2030. The social impact of ever-growing resource use disproportionately affects the world's poor--the 3 billion people living on less than $2.50 a day--as they struggle to acquire what is needed to survive. The serious ecological and social challenges we face in trying to establish global sustainable supply chains must not be...