Today's societal challenges are at a scale and complexity that cannot be fully addressed by any single organization or institutional actor. Progress requires forums and initiatives with representation from a wide range of relevant stakeholders.The Consortia Century makes the bold prediction that consortia, spanning diverse stakeholders, will be the defining institutional arrangement of the 21st Century. Consortia are not new, but will grow in importance as social, political, economic, environmental, and technological challenges increase. The book presents supporting case examples and provides a model for achieving sufficient stakeholder alignment for collective action - enabling interdependent individuals, groups, and organizations to accomplish together what they cannot do separately. With this book, The Stakeholder Alignment Collaborative provides both the conceptual underpinnings for lateral alignment across stakeholders and practical guidance to advance into what will be needed for the consortia century.