United Nations - President Barack Obama conceded Tuesday that the United States and other world powers have limited ability to solve the most profound challenges facing the world, while calling for a “course correction” for globalization to ensure that nations don’t retreat into a more sharply divided world.

Obama, in his final speech to the U.N. General Assembly, acknowledged that the extremist and sectarian violence wreaking havoc in the Middle East and elsewhere “will not be quickly reversed.” Still, he stuck faithfully to his insistence that diplomatic efforts and not military solutions are the key to resolving Syria’s civil war and other conflicts.

“If we are honest, we know that no external power is going to be able to force different religious communities or ethnic communities to co-exist for long,” Obama said. “Until basic questions are answered about how communities co-exist, the embers of extremism will continue to burn. Countless human beings will suffer.”

In a less-than-subtle jab at Donald Trump, the Republican running to replace him, Obama said, “The world is too small for us to simply be able to build a wall and prevent (extremism) from affecting our own societies.”... Read More: VIN