Despite some critics, the recent U.S.-China agreement over carbon emissions has sparked remarkable optimism in global climate negotiations. It’s also opened the door to new bilateral engagement between the U.S. and Chinese environmental communities on other issues, including China’s massive air pollution problems (16 of the world’s 20 most polluted cities are in China).

“We cannot ignore the new reality that climate change has become a major foreign policy issue in the 21^st century,” a new film by Hal and Marilyn Weiner concludes.

This fall, a series of significant events signaled what many see as a shift toward meaningful collective action on climate change.

The 69^th UN General Assembly was “an absolutely extraordinary opportunity” to rethink global development, said Genevieve Maricle, a senior policy advisor to the U.S. Ambassador to the UN Social and Economic Council (ECOSOC) who participated in the summit. [Video Below]

Global crises like the Ebola outbreak force us to consider what “security” really means, said Sharon Burke, senior advisor for the New America Foundation. “Is security getting our kids to school and food on the table…or are you talking about military security and defense threats that require a weapon to counter?”

By 2045, global population will be north of 9 billion with increased urbanization and migration, natural resource stress, improved medical technologies, greater use of robotic labor, and a shift towards lifelong (and increasingly online) learning, according to a recent report from the UK Ministry of Defense.