You chumps do not understand History.
Do you believe that historical knowledge seeps away every day?
Modern historians have the work of previous historians to build on PLUS the fruits of continuing research and information not previously available.

Jim mentions education.
Here is a piece from The Times Educational Supplement offering guidance to teachers.
You should read it, but you won't so I will provide some extracts.
Please at least read those.
http://www.tes.co.uk/article.aspx?storyCode=6373287