The word “advocacy” is used extensively by Greg French in his recently published book ”The Last Wild Trout”. In reading the context in which he uses it, the meaning is abundantly clear, but for a simple starting point here is the definition as found on Google: ad·vo·ca·cy ….pronounced ˈadvəkəsē/  : noun public support for or recommendation of a particular cause or policy. example: "their advocacy of traditional family values" synonyms:  support for, backing of, promotion of, championing of; I found that French’s book in general, and the repeated use of this word in the informative “conservation notes” at the end