It was a system of direct democracy, in which participating citizens voted directly on legislation and executive bills. Participation was not open to all residents: to vote one had to be an adult, male citizen i.e. neither a foreign resident, slave or a woman and the number of these "varied between 30,000 and 50,000 out of a total population of around 250,000 to 300,000" or "no more than 30 percent of the total adult population."[1]