In ancient Athens as well as Renaissance Florence, direct and representative democracy co-existed. The representatives elected or chosen by lot were viewed (and viewed themselves!) as standing in for the people assembled. From a practical standpoint, it is difficult even to legislate by town hall meeting or by a series of referendums on election day. Accordingly, power in democracies has been delegated to representatives and even appointees. In February 2012, this principle, and direct democracy itself, were set to be challenged in a federal lawsuit against Colorado. In my view, the principle is valid whereas the suit is not. Direct democracy outranks representative democracy—the latter having been created not to save a people from themselves but out of sheer practicality.
The full essay is at "Direct and Representative Democracy."