Check this out.
With its current foundation and rich natural resources, the country(Turkey) needs only to reduce the natural population increase rate slightly in order to achieve a balanced economic development.
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/funds/what-doubters-get-wrong-about-6040-portfolio
What the 60 percent stock portfolio and the 40 percent bond portfolio helps your portfolio