Successful revolutions, by their nature, can never remain confined to one social group. For the last 30 years, as women of all ages and family statuses have streamed into the workplace, rearranging the balance of their ties to employment and child rearing, men have been experiencing a quiet revolution of their own. While men who provide the sole or major economic support to their families have not disappeared, their ranks have dwindled. Even generous estimates suggest that no more than a third of American households now depend solely or primarily on a male earner.