J.M. Barrie was a Scottish writer best known for his play 'Peter Pan' and the social satire 'The Admirable Crichton.' The latter explores themes of class hierarchy and leadership dynamics as characters from the English aristocracy find themselves stranded on a deserted island, with the butler Crichton emerging as their natural leader. Through character development and situational irony, the play critiques the British social system and highlights the adaptability of individuals when faced with new challenges.