Sentence:  These men - for the most part educated in our `` best '' New England colleges , well established financially and socially in the community - under kindly but insistent probing , reveal little or no objective or explicit criteria or data for their generalizations about the interests and attitudes of the people they claim to <WSD>serve</WSD> , or about the public responses that actually follow their occasional breach of a `` client-service relationship '' . 
Meaning of the word marked with <WSD> tags:  devote (part of) one's life or efforts to, as of countries, institutions, or ideas