On a wide scale?
I'm taking half an hour to wind down at the end of the working week, eating houmous and watching an old episode of the Antiques Roadshow on Yesterday. There is a beautiful old (18C?) paperweight which got me thinking.
Were old houses so drafty that people were always having to weigh down papers to prevent them blowing away?
Or were they originally the old equivalent of paperclips - a way of grouping papers into sets for organisational purposes?
Or have they always been a bit useful, but mainly an excuse for a decorative object?