Por esto son Ricos los Países Nórdicos

¿Por qué son más ricos los países del norte? Claves de la riqueza de los países nórdicos.
Algunas fuentes consultadas:
http://www.ipu.org/pdf/publications/WIP20Y-en.pdf
http://datos.bancomundial.org/indicador/SL.TLF.CACT.FE.ZS?end=2016&start=2016&view=map&year=1990
https://www.infoplease.com/world/political-statistics/worlds-least-corrupt-nations-2015
http://www.oxfam.org.uk/what-we-do/good-enough-to-eat
http://www.elperiodico.com/es/graficos/educacion/resultados-informe-pisa-2016-17670/
http://www.oecd.org/pisa/singapur-encabeza-la-ultima-encuesta-pisa-sobre-educacion-que-realiza-la-ocde-a-escala-internacional.htm
https://www.businessinsider.com.au/why-finland-fell-in-the-pisa-rankings-2013-12?r=US&IR=T
https://www.businessinsider.com.au/finlands-education-system-best-in-world-2012-11#finnish-children-dont-start-school-until-they-are-7-1
http://www.nytimes.com/2011/12/13/education/from-finland-an-intriguing-school-reform-model.html?src=me&ref=general
https://hipertextual.com/2017/03/informe-mundial-mas-felices
http://worldhappiness.report/
https://rsf.org/fr/classement
http://www.scandinavianaturist.org/node/224
http://www.bbc.com/news/magazine-22751415
https://www.pri.org/stories/2012-06-26/sweden-imports-waste-european-neighbors-fuel-waste-energy-program
https://confidencial.com.ni/bienestar-social-los-paises-nordicos/

Música:
"Long Road Ahead" Kevin MacLeod (incompetech.com)
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