I was reading the Wikipedia on passports, and there were numerous important dates in passport history, but I didn't find any date when passports became widely used documents for travelling.
I see passports from late 19th century, and general passports were regulated by League of Nations in 1920s. Based on this my guess is that in 1920 the passports were used by almost all countries of the world.
My question is: (approximately) when passports and border checks became widespread and commonly used procedures?
UPDATE: adding more precision: when became passports (or its predecessor) as a travel document standard way to check travellers around the world?