Explain that in what practice many democracies did not fulfil this expectation?

If you consider all democracies and all dictatorships for the fifty years between1950 and 2000, dictatorships have slightly higher rate of economic growth. The inability of democracy to achieve higher economic development worries us. But this alone cannot be reason to reject democracy. As you have already studied in economics, economic development depends on several factors: country’s population size, global situation, cooperation from other countries, economic priorities adopted by the country, etc. economic development between less developed countries with dictatorships and democracies is negligible.