
Rod B. answered 08/15/19
STANFORD/HARVARD MACROECONOMICS TUTOR,40+ years of teaching experience
In your paragraph you make different questions:
1. Has the world become poorer?
The general answer is: No. The World GDP per capita has increased in the last decades. See the World Bank chart in : https://data.worldbank.org/indicator/ny.gdp.pcap.cd
The situation is different in each country. The population in Venezuela has become poorer in the last decade. East Asia and the Pacific area have grown more that the world average.
2. Inequality? Economic vs. Social Indicators.
GDP per capita and inequality are economic indicators.
Inequality indicators measure how income or wealth are distributed. African countries have more inequality than Scandinavian countries. One indicator is the Gini index. In the last years, for example, income inequality measured by that index has grown in the US. See: https://www.cia.gov/library/publications/the-world-factbook/rankorder/2172rank.html
There are social indicators related to health, education, housing, etc. The United Nations tracks them (see: https://unstats.un.org/unsd/demographic/products/socind/)
3. Economics of Happiness.
There has been studies relating GDP per capita and happiness.
The general conclusions are:
- If GDP per capita is very low, the population is not happy (Benin, Haiti).
- After a certain level of GDP per capita (us$ 15,000 for example) more money does not increase happiness. People in Denmark, for example are happier than Americans (that can buy more goods and services).
If you are interested read: https://www.brookings.edu/wp-content/uploads/2016/06/200509.pdf
Rod