In the beginning of season 4 of "The Walking Dead" Rick wanted nothing to do with a leadership role. He was still reeling from the loss of his wife. He was forced into making decisions a few times, even after he handed the group over to a council that he wasn't apart of. In episode eight, The Governor forced him to decide to let the prison be taken by force or to hand it over. Rick chose that they should fight because it was their home now. Of course, that ended up badly and ended up with Hershel losing his life.
When Carol told Rick that she was the one that set the original sick people on fire in hopes of stopping an outbreak (which didn't work) he banished her from the prison even though she was a counsel member and could have told him where to stick it. She naturally followed his orders and didn't return to the prison.
If you ask Carl, Rick hasn't been doing so well lately in making the right choices when it comes to leading the group and he doesn't think that he should get the chance to do it again. Now there is three of them since Michonne found her way to the Grimes men and she will likely take over sine Rick can hardly lead himself to the kitchen to find food.
Andrew Lincoln, who plays Rick Grimes, feels that Rick has the resolve of 100 people and could easily slide right back into a leadership role. With the group being divided as it is, it is going to take a lot of leadership to bring them back together. The question is, is Rick the man to do it?