David J. Lepoire has a Ph.D. in computer science from DePaul University in Chicago, USA, and a B.S. in physics from California Institute of Technology, USA. He has worked in environmental and energy areas for many governmental agencies over the past 25 years.

Leonid E. Grinin is Russian Sociologist, Political Anthropologist, Economist, and Scholar of historical trends and future studies. He is Senior Research Professor at the Institute for Oriental Studies of the Russian Academy of Sciences in Moscow and Leading Research Fellow of the Laboratory for Destabilization Risk Monitoring of the National Research University Higher School of Economics. He is Director of the Eurasian Center for Big History & System Forecasting of the Russian Academy of Sciences and Research Professor and Director of the Volgograd Center for Social Research. He is Vice-President of the International Kondratieff Fund and Member of the International Big History Association.

Andrey V. Korotayev is Director of the Center for Stability and Risks Analysis at the HSE University in Moscow, Russia. He is also Senior Research Professor at the Institute of Oriental Studies and Institute for African Studies, Russian Academy of Sciences, as well as at the Faculty of Global Studies of the Lomonosov Moscow State University and the Russian Presidential Academy of National Economy and Public Administration.

Chapter 1. Navigating Complexity in Big History – Exploring Periodization Across Cosmic and Biosocial Dimensions. An Introduction (David LePoire).- Part I. Periodization: Criteria and Methodology.- Chapter 2. Comparing and Contrasting Big History Periodization Approaches (Ken Solis).- Chapter 3. Some Possible Methodological Ideas for Periodizing Big History (Leonid Grinin).- Chapter 4. Theorizing in Big History: What we are learning (Robert Aunger).- Part II. Frameworks & Periodization.- Chapter 5. Comparing and Contrasting Big History Singularity Trends of the Big Bang and Terrestrial Evolution (Andrey Korotayev).- Chapter 6. A Simple, Compatible, and Extensible Big History Framework and Periodization Based on Previous Findings (David LePoire).- Chapter 7. Integrating the Tree of Knowledge and Combogenesis Approaches to Big History (Tyler Volk).- Chapter 8. A New Theory of Evolution is Supported by the Teaching Patterns of Human Ancestors (Nick Hoggard).- Chapter 9. Unification of Biological and Cultural Evolution Through Natural Periodization (Erhard Glötzl).- Chapter 10. Big History Periodization. Complexity, Directions, and Phase Characteristics (Leonid Grinin).- Part III. Complexity Aspects in Periodization.- Chapter 11. Development of Mass and Energy Rate (Density) of Dissipative Systems over Their Lifetimes: A Comparison of a Low-Mass Star, Like our Sun, a Human and the Roman Empire (Martin van Duin).