Which universal theme does the author incorporate in this passage? "'answers to the name of buck,'" the man soliloquized, quoting from the saloon-keeper's letter which had announced the consignment of the crate and contents. "well, buck, my boy," he went on in a genial voice, "we've had our little ruction, and the best thing we can do is to let it go at that. you've learned your place, and i know mine. be a good dog and all 'll go well and the goose hang high. be a bad dog, and i'll whale the stuffin' outa you. understand? " from the call of the wild by jack london the illusion of progress