http://visionofhumanity.org/app/uploads/2019/06/GPI-2019-web003.pdf
https://www.ifs.org.uk/inequality/wp-content/uploads/2019/05/The-IFS-Deaton-Review-launch_final.pdf
https://theconversation.com/lo-que-shakespeare-puede-ensenarnos-sobre-el-racismo-229333