A NEW breed of educated women has discovered the secret of a happy marriage — opting to stay at home instead of pursuing a career. The phenomenon, in which wives prefer their husbands to be the main breadwinner, has been identified by American sociologists and is now gaining a foothold in Britain. Unlike the housewives of the 1950s, who had little choice over rearing children and acting as homemaker, this generation of women is building on the advances of the feminist movement to determine their optimum lifestyle. The women are predominantly drawn from the middle classes and have young offspring....