The olive tree is also the cornerstone of the domestic house-hold (oikos) and a sign of civilization, the inhabited world of arable land and agriculture. It is interesting that the olive tree is considered the cornerstone of the domestic household and a sign of civilization because of the health benefits of olive oil within the Mediterranean diet. It is labeled that the Mediterranean diet is superior for health and aesthetically pleasing and would not be labeled this without olive oil as a staple within the diet. Olive oil, because of the Mediterranean diet has been accepted as a staple in combating heart disease as well with the growth of heart disease among Americans in the 1970’s. This was interesting to me because currently America has seen a new trend in the “paleo” nutrition that would equate to the use of olive oil much more exclusively in everyday life and everyday meals.