The bishops "bickered" during the recent synod at the Vatican on families -- yes, the article by CNN said "bickered" -- and a lot of people wondered why Pope Francis doesn't just order changes, rather than call a two-week debatefest.

Good question, and CNN's Daniel Burke has a good answer. Actually, four good answers, highlighting the variety of sources and factions within the Roman Catholic Church. And he lays them out in mostly even-handed fashion. We'll look at the exceptions in a bit.

The Vatican synod, as you may know, was called to spot new ways of helping stressed-out families. The bishops also were charged with seeking out the possibility of providing Eucharist and other Church services to gay couples and to Catholics who had divorced and remarried.

Burke alertly reports Francis' silence throughout the quarrels, as a pope who wanted to encourage dialogue rather than hand down decrees. The reporter even quotes a Latin saying by a Vatican cardinal: Roma locuta, causa finita, or "Rome has spoken, the case is closed." Ergo, if Francis had volunteered opinions, the conferees would have fallen silent.

The bishops, as reports said, considered a passage on accepting gays as members, then watered it down and then erased it altogether. As Burke reports, Francis still tried to prod the meeting his way:

In a widely praised speech, he told them the church must find a middle path between showing mercy toward people on the margins and holding tight to church teachings.

What's more, he said, church leaders still have a year to find "concrete solutions" to the problems plaguing modern families -- from war and poverty to hostility toward nontraditional unions. A follow-up meeting is scheduled for next October in Rome.