A study was made to see which Western babies were the quietest, and people from Denmark reported the least crying.
But when the scientists went to Denmark to study it, they found that Danish babies cry just as much as other Western babies. It turned out that even though you'll find plenty of Danes complaining about noisy babies, Danes in general are much more tolerant of crying babies than in other countries and it takes more for them to get annoyed. So the scientists then tried to explain that, and so far their best guess is that Danes have more room for children of all ages expressing themselves.
The quietest babies in the world can be found in African and Far Eastern countries, where the parents (or grandparents) usually have the babies with them at all time, which makes the babies feel safe.