Even if 2050 seems a distant date, it is still worth the effort we plan to devote to this challenge.
First of all, this date must be compared with the fact that it is essential to arrive in time to defeat a disaster, that of climate change.
Furthermore wellness, thought not as luxury, but as greater life expectancy, schooling and comfort or the factors that determine prosperity and social rights, must be maintained and extended geographically on the planet and the support of a sustainable energy source is a primary good for this enjoyment.
Water (in modest quantities) and lithium to extract the fuel for the nuclear fusion reactor are present throughout the earth's crust, so we will be able to build our plants more or less everywhere and the social impact will be really important.
Added to this is the characteristic of a low environmental impact, which in any case contributes to promoting prosperity.