A number of MPs have announced their retirement from politics in the last few days, many of them women who have been targeted by torrents of personal abuse and threats to their family. Some have been advised by the police that it is too dangerous for them to hold open surgeries, or campaign door-to-door after dark. Others are leaving parliament because they feel their party has left them; the most prominent is Nicky Morgan, the last standard-bearer of David Cameron-style conservatism, who is quitting politics at the age of 46, in what would conventionally be considered the prime of her career. The exodus has prompted newspaper eulogies to the ‘last moderates’ and laments over our ideologically divided times; all assume that sharp ideological division is intrinsically negative.