Everyone assumes that John Paul II's successor will be a conservative. Don't bet on it. The Vatican, the 109-acre inter-national headquarters of Roman Catholicism, works at the leisurely pace of an institution that has seen it all over 2,000 years of history. This is a place that closes shop every day at 1 p.m., where decisions that might take weeks in other organizations can be "studied" for years, awaiting an "opportune" moment to be announced. It is not accustomed to working under pressure of tight deadlines, as it showed in late April, when all 13 American cardinals were summoned for...