There's a science to understanding the ways that trust is formed, broken and rebuilt.
The investigation has been criticised for being too closely linked to the establishment, but is it also too close to the victims of abuse?
What has the Chilcot Inquiry actually achieved? Here's what the experts had to say.
British political life increasingly revolves around expensive investigations that make a fetish of looking backwards.
The Iraq inquiry, launched in 2009, still hasn't published its report.
The health service has a long history both of abuse and the failure to do anything about it.