Try googling around for "cqrs". There are many ideas on how to do exactly this effectively.

All it takes is to swap "write" operation with "event" entity (all is state). Combine that with intention revealing commands (customer_died instead of delete from customers where id=1) and you hit jackpot.

End result is nice stream of events which is ultimate source of truth and enables crazy queries you never thought you would ever need http://abdullin.com/journal/2010/6/3/time-machines-should-su...