Dentists of all countries have noticed that in the last 30 years a lot of people appeared with teeth making congestion and wisdom teeth don't grow in many of them.

This is a consequence of the jaw bone decrease and modern scientists consider it as an evolutionary process of the food adaptation that we have to munch. You must admit that the teeth and massive jaws are not necessary to swallow Big Mac. You need teeth to eat a piece of raw meat, but now no one does it, though.