Philo Judaeus De Josepho 30

[30] and the cause of this the want of union, and participation existing not merely between the Greeks and the barbarians, or between the barbarians and the Greeks, but also between the different tribes of each of these respective nations. Then they, as it would seem, blaming those things which do not deserve blame, such as unexpected occurrences or opportunities, deficiency of crops, badness of soil, their own situation either as being by the sea-side, or inland, or insular, or on the continent, or anything of that sort, are silent as to the real truth. The real truth is their covetousness, their want of good faith towards and confidence in one another, on which account they have not been satisfied with the laws of nature, but have called those regulations, which have appeared to be for the common advantage of the agreeing and unanimous multitudes, laws, so that the individual constitutions do naturally appear rather in the light of additions to the one great general constitution of nature;