This means that the energy supply has reliably grown per capita, which has enabled Earth’s ever-growing human population. Each generation of humans produces more energy than its ancestors.
But in the past 50 years, as the population has exploded exponentially, the ratio between energy increases and population growth has trended towards 1:1, which might mean that Earth’s exponential population growth may be coming to an end. Future growth might be more linear than exponential.
There’s been discussion in technologist circles that energy use might be a better proxy than GDP for prosperity. Turns out, it also might an important variable to look at when projecting at the future of humanity.