According to Michael Lind, "a worldview is a more or less coherent understanding of the nature of reality, which permits its holders to interpret new information in light of their preconceptions. Clashes among worldviews cannot be ended by a simple appeal to facts. Even if rival sides agree on the facts, people may disagree on conclusions because of their different premises." This is why politicians often seem to talk past one another, or ascribe different meanings to the same events. Tribal or national wars are often the result of incompatible worldviews. Lind has organized American political worldviews into five categories: