overview section must go We know that the overview section is contrary to article content guidelines Editors who are angry about how long this article is might like to start cutting there The table of causes seems worthwhile and could go in the history section where Tinbergen is discussed The Principles list is also packed with information and maybe could live as its own section The rest of the material is good but most of it isn t sourced and most of it duplicates material that s either in the body or in the lead Left to my own devices I would rescue the Tinbergen table and the list of principles but then mass delete the rest talk