In pre-contact society, tapu was one of the strongest forces in Māori life. A violation of tapu could have dire consequences, including the death of the offender through sickness or at the hands of someone affected by the offence. In earlier times food cooked for a person of high rank was tapu, and could not be eaten by an inferior. A chief's house was tapu, and even the chief could not eat food in the interior of his house. Not only were the houses of people of high rank perceived to be tapu, but also their possessions including their clothing. Burial grounds and places of death were always tapu, and these areas were often surrounded by a protective fence.