Parshat ha Shavuah Verses Eikev / עקב

Reading these last parashot of the year, I keep wondering – why did things go wrong after the years of miraculous existence in the desert that should have taught our forefathers all the right things? יב  וְהָיָה עֵקֶב תִּשְׁמְעוּן, אֵת הַמִּשְׁפָּטִים הָאֵלֶּה, וּשְׁמַרְתֶּם וַעֲשִׂיתֶם, אֹתָם–וְשָׁמַר יְהוָה אֱלֹהֶיךָ לְךָ, אֶת-הַבְּרִית וְאֶת-הַחֶסֶד, אֲשֶׁר נִשְׁבַּע, לַאֲבֹתֶיךָ. 12 And it shall come…