The unthinkable idea is beginning to be thunk

Political scientist Nelson Wiseman, at HistoryWire (which has too much politics and too little history, but never mind) considers "how to empower MPs":

let party caucuses determine once again their leader. Leaders would have to court and listen to their MPs rather than vice-versa. Having popularly elected MPs select their leader is arguably more democratic, accountable, and transparent than having “instant” party members elect delegate slates at manipulated constituency meetings.

When the caucus of a major political party adopts and enacts this program, I promise to write a memoir called "How I Saved the Country." But it may be a while yet.