Comparison of life expectancy in 2015 and 2050 and the proportion of people over 65 years of age (predicted values), in different countries and geographical areas around the world (source: United Nations, 2015; World Health Organization, 2016; OECD, 2017). European countries, Japan, New Zealand, Australia, the USA and Canada will reach the highest life expectancies (close to or above 90 years), and the rate of people older than 65 will be at least 28% by 2050, with the highest incidence of neurodegenerative disorders (marked in red). Similarly, by 2050, the life expectancy and rates of people older than 65 will increase between 1.5‐fold and 3‐fold in Russia, China, Saudi Arabia, South Africa, Brazil, Argentina and particularly in Maghreb countries, Mexico, some countries in Central America and India, also in association with an important increase in the incidence of these disorders (marked in yellow).