What is the single most important function of museums?

The Museums Association has made a short film asking museum professionals ‘what is the single most important function of museums?’ and uploaded it on YouTube. Here it is

First of all, I am really glad that the MA has decided to explore the use of YouTube.

The responses are really interesting and varied (some familiar faces there), ranging from ‘the real thing’ and ‘cultural memory’, to ‘dissemination of infomation’, ‘education’, and ‘inspiration’, to ‘challenging identities’, ‘changing lives’ and ‘improving the world’…which raises the question: ‘is there a single, most important function of museums’?