I would argue the same thing happened to the Republican Party in America. The G.O.P. used to be an incredibly rich polyculture. It gave us ideas as diverse as our national parks (under Theodore Roosevelt), the Environmental Protection Agency and Clean Air and Clean Water Acts (under Richard Nixon), radical nuclear arms control and the Montreal Protocol to close the ozone hole (under Ronald Reagan), cap-and-trade to curb acid rain (under George H. W. Bush), and market-based health care reform (under Mitt Romney when he was governor of
