Sentence:  An enthusiastic literary critical response ranged from Graham Greene, who admired Byron's <WSD>demotic</WSD>, conversational brilliance, to the rivalrous Evelyn Waugh, who had to concede the book's high spirits, via the Sunday Times, which linked Byron to his namesake (no relation) and declared him “the last and finest fruit of the insolent humanism of the 18th century”. 
Meaning of the word marked with <WSD> tags:  Of or for the common people.