RulesToConsider|Establish_Context
Almost every entry in the Wikipedia should begin with a line or two that establishes context. These opening lines should include the most basic facts about the subject.
An article on Charles Darwin should not begin with "Darwin created controversy with the publication of the Origin of Species...." It should begin with "Charles Darwin was a 19th century biologist who proposed the modern theory of evolution."
An article on Scotland should not begin with "Scotland retains its identity despite political dominance by the English..." It should begin by stating what Scotland is, where it is, etc.: "Scotland is part of the United Kingdom, located in the northern end of the British Isles..."