 Nevertheless, as forcing people to work for others was a human-produced condition, it was not considered natural and, hence, was part of the "ius gentium" but not the "ius naturale".The "ius naturale" of the Roman jurists is not the same as implied by the modern sense of natural law as something derived from pure reason.As Sir Henry James Sumner Maine puts it, "it was never thought of as founded on quite untested principles.