I submit that a reason for humanity's continuous failings is the non-credence of lessons of the effects of the application of undue punishment upon people and societies.
The rise of Adolf Hitler's Nazis to inflict genocide upon an unsuspecting world resulted from the direct imposition of undue punishment on Germany for its actions during World War I. Thus, the destructive World War II was largely enabled by extreme punishment upon a society.
In lieu of undue punishment upon Germany after World War II, a more pragmatic reconstruction Marshall Plan is widely credited with holding relative peace in Europe for over 75-years, with the exception of Russia expansions and Balkan events.
Today, considered undue punishment meted out to the brides, partners and children of former Islamic State (IS) fighters, could serve as an incubator for another flare of violence in the Middle East. The failure of nations to repatriate their daughters have left many young women and their growing children exposed to extreme rhetoric and actions within camps in northern Syria.
Moreover, further undue punishment upon the people of Iran since the erosion of the world-signed Iran Nuclear Deal, continues to set up an even greater likelihood of an episode of violence and instability in the Middle East.
History has provided stark realities of the ramifications brought to wrought by undue punishment upon societies. And to avoid a repeat of the destruction of yore, today's decision makers have the responsibility to remove undue punishment upon all sufferers.