Author | Marcos MartínezThis is a global trend. As different societies reach a certain level of stability and life expectancy, the number of children per woman in developed countries is declining. Longevity and fewer children mean the classic population pyramid has now inverted. This causes problems such as maintaining social security systems. But also environmental opportunities.Why are there more and more older people?According to figures by the World Bank, 65% of the global population is aged between 15 and 64 years. In 1967, this figure only just touched 60%. We are getting older, together. Vaccines, health systems and other medical advances have enabled life expectancy to increase.We are not sure whether or not there is an age limit. At the moment, life expectancy at birth stands at a maximum of 78 years. The World Bank chart shows how all the continents are rapidly reaching that figure.Likewise, social stability and not needing to have children to look after us is making birth rates decline quite rapidly. Once again, this is illustrated with figures in the interactive chart. Rich countries are having fewer children and there are fewer poor countries.The poverty gap is closing “rapidly”. In 1981, 42.1% of the global population lived in extreme poverty compared with 9.9% in 2015. The trend is clear: we will live in increasingly aging societies with around 1.7-1.9 children per woman.
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