When Forbes magazine released its first global billionaires list in 1987, just 140 names appeared on it. The 2025 version featured more than 3,000 people, worth a collective $16tn.

Even allowing for factors such as the rise of China and over three decades of inflation, it is a staggering increase in both numbers and values; the net worth of Elon Musk, judged the world’s richest person in April 2025, was estimated at $342bn — compared with $295bn for the entire class of 1987.

Globally, the average wealth of the top 0.0001 per cent of the population grew on average 7.1 per cent a year between 1987 and 2024, compared to 3.2 per cent for the average adult, according to Gabriel Zucman, a professor of economics at the Paris School of Economics and at the University of California, Berkeley.