McMurphy is Selfish

Throughout the novel so far, McMurphy is seen as a selfish character. Readers can either see McMurphy as being self-centered or caring for others, but through McMurphy's actions isnt he helping others just to help himself. For example, on page 138, when McMurphy defies the big nurse, allowing all the other men such as Harding, Cheswick, bibbit, Scanlon, Frederickson, and Sefelt to do the same thing by not cleaning the floors, is this considered selfishness or helping others out of the fog. By going against the authority is McMurphy looking out for himself, or everyone else? This ends up with the men sitting watching a blank screen to prove a point to the big nurse, but was this also just McMurphy proving a point to the big nurse? "The Cheswick goes and gets him a chair, and then Billy Bibbit goes, and then Scanlon and then Frederickson and Sefelt, and then we all put down our mops and brooms and scouring rags and we all go pull us chairs up." 138)