A new book describes the current state of Vatican affairs not so much through the lens of Pope Francis’ nine-year papacy, but via Benedict’s nine-year retirement.

“The extent of the abuse quagmire becomes clearer with every study. It will take more than one person, even if he is pope, to drain this swamp,” Archbishop Gänswein told the German newspaper Die Zeit.

The private secretary of Benedict XVI, Archbishop Georg Gaenswein, has defended the former pope and criticised the Munich abuse report which made international headlines when it was released in January.

On this deep dive episode of “Inside the Vatican,” we examine the lessons from Benedict XVI's post-papacy—and what needs to change to protect future popes who retire.

Although Benedict expresses regret that abuse happened on his watch, he does not take responsibility for any specific cases, and his lawyers maintain his innocence.