 In June 2015, the 10th Whitehead International Conference was held in Claremont, CA. Called “Seizing an Alternative: Toward an Ecological Civilization”, it claimed an organic, relational, integrated, nondual, and processive conceptuality is needed, and that Alfred North Whitehead provides this in a remarkably comprehensive and rigorous way. We proposed that he could be “the philosopher of ecological civilization”. With the help of those who have come to an ecological vision in other ways, the conference explored this Whiteheadian alternative, showing how it can provide the shared vision so urgently needed.