Solon (18.5-19.1)

Moreover, thinking it his duty to make still further provision for the weakness of the multitude, he gave every citizen the privilege of entering suit in behalf of one who had suffered wrong. If a man was assaulted, and suffered violence or injury, it was the privilege of any one who had the ability and the inclination, to indict the wrong-doer and prosecute him. The law-giver in this way rightly accustomed the citizens, as members of one body, to feel and sympathize with one another’s wrongs. And we are told of a saying of his which is consonant with this law. Being asked, namely, what city was best to live in, That city he replied, in which those who are not wronged, no less than those who are wronged, exert themselves to punish the wrongdoers.

After he had established the council of the Areiopagus, consisting of those who had been archons year by year (and he himself was a member of this body since he had been archon), he observed that the common people were uneasy and bold in consequence of their release from debt, and therefore established another council besides, consisting of four hundred men, one hundred chosen from each of the four tribes.[*] These were to deliberate on public matters before the people did, and were not to allow any matter to come before the popular assembly without such previous deliberation.