USA Today: As the United Nation marks its 70th anniversary later this year, there is mounting evidence that the international community is losing the fight against the most pressing security and justice challenges of our time. From Syria to sub-Saharan Africa, a marked increase in mass atrocities has undermined basic human rights and reversed the trend of declining political violence that began with the end of the Cold War. Climate change, cyber-attacks, and the threat of cross-border economic shocks also pose...