For half a century, statisticians, pundits and politicians have warned that a burgeoning planetary population will soon overwhelm the earth’s resources. But a growing number of experts are sounding a different kind of alarm. Rather than growing exponentially, they argue, the global population is headed for a steep decline.

They find that a smaller global population will bring with it a number of benefits: fewer workers will command higher wages; good jobs will prompt innovation; the environment will improve; the risk of famine will wane; and falling birthrates in the developing world will bring greater affluence and autonomy for women. But enormous disruption lies ahead, too. We can already see the effects in Europe and parts of Asia, as aging populations and worker shortages weaken the economy and impose crippling demands on healthcare and vital social services. There may be earth-shaking implications on a geopolitical scale as well.

Empty Planet is a hugely important book for our times. Captivating and persuasive, it is a story about urbanisation, access to education and the empowerment of women to choose their own destinies. It is about the secularisation of societies and the vital role that immigration has to play in our futures.