Man’s jaw size has steadily decreased over time throughout evolution. As our diets of raw meats and plants have evolved into more processed and cooked foods, the size of modern man’s jaw has decreased and the need for 32 teeth has decreased as well. These factors often cause our last set of molars known as your wisdom teeth to have no room to erupt properly in alignment with your gums and other teeth. Some people genetically are missing one or more wisdom teeth. Other people’s wisdom teeth stay completely impacted or buried in the jaw never erupting through the gum. And yet other people (the majority) have wisdom teeth that partially erupt, never achieving a stable position or fully erupt in an unstable position.