According to Andrew Roberts, the English speaking countries, the Anglosphere, today account for more than one third of global GDP, despite their combined population being only 7.5% of the world’s population [i].
These countries share a common origin, their common constitutional system which gradually evolved over centuries. The constitution which emerged in the Glorious Revolution of 1688 is the basis of later developments in all of the English speaking countries.
It is not that the English speaking people are more intelligent than anyone else . It is that they have long been accustomed to a liberal constitutional system.
Such a constitution provides stable, limited government where people are more free to make their own decisions. It also ensures that there are effective checks and balances against the abuse of power.
An electorate used to living under such a constitution becomes more capable of making sophisticated judgements in deciding how to vote. They are above all suspicious of those who would overthrow the constitution. So the electorates of the English speaking countries have typically rejected extremes at either end of the political spectrum.
The electors can of course be misled, but they are less inclined than others to render heroic status to their leaders or to be swayed by adventurism. Accordingly it is no co-incidence that the communist and fascist parties never attracted any significant support in English speaking countries, in contradiction to many of the apparently sophisticated European continental countries.
By maintaining a liberal constitution, the result is that the electorate becomes a guardian of that system.