Sforno on Deuteronomy 28:15/ספורנו על דברים כ״ח:ט״ו

1אם לא תשמע בקול ה' אלוקיך לשמור לעשות את כל מצותיו וחקותיו אשר אנכי מצוך היום, with these words Moses introduces his admonitions, the ones which parallel chapter 26 in Leviticus, but are sounding far more devastating. Israel is described as “backsliding,” having, with the help of Torah legislation, been the frontrunner in civilised countries. Whenever the Torah speaks about the Jewish people abandoning the laws of the Torah, the intention is not to make us think that they slid into anarchy, but worse, they slid into adopting the laws of the prevalent cultures and civilisations. Clearly, this is an even greater affront to G’d the Lawgiver, than merely being passive and not carrying out Torah legislation. Social legislation involving tithes was largely ignored, leading to such great scholars as Hillel, and the High Priest Yochanan decreeing legalistic means of circumventing the legislation so that the people would not be guilty of violating such basic social laws as forgiving overdue debts at the end of the Sh’mittah year. The Rabbis, in a number of instances, were forced to preserve the spirit of the law, sometimes at the expense of what may be termed “the letter of the law.” The discontinuance of the examination by the priest of a woman suspected of marital infidelity, Sotah, is one such example, the Rabbis feeling that when infidelity had become the norm rather than the exception, it would not do to demand a miracle from G’d every time such a situation arose. Moreover, the chances were that the husband’s sexual life was not so free from blemish that he could point a finger at his wife. (Compare Shviit,1,3, Maasser Sheyni 5,15, Sotah 46,48,49) Other practices, such as referring disputes to pagan judges of the nation (Greeks or Romans) occupying Israel at the time, made it almost impossible for the Jewish judiciary, even when meaning to preside over Torah law, to be an effective legal instrument. All of these conditions became a self-fulfilling prophecy in the decline of the Jewish people as a holy nation and led to the destruction of Jerusalem and the end of Jewish independence on a land of their own.