1. Introduction / Ian Goldin --

2. Optimum population, welfare economics, and inequality / Anthony B. Atkinson --

3. Overpopulation or underpopulation? / Toby Ord --

4. Demographic and environmental transitions / Sarah Harper --

5. Towards a contemporary understanding of the limits to growth / Ian Johnson --

6. How can 9-10 billion people be fed sustainably and equitably by 2050? / H. Charles J. Godfray --

7. Water scarcity on a blue planet / Mark New --

8. The metabolism of a human-dominated planet / Yadvinder Malhi --

9. Safe, effective, and affordable health care for a bulging population / Robyn Norton --

10. Sourcing mineral resources : problems and solutions / Anthony Hartwell --

11. Governance matters most / Ian Goldin.