The potential security challenges linked with climate change can make for great headlines. While sensationalist claims about water wars, states collapsing in chaos, or the forced migration of hundreds of millions cannot be completely discounted for the long term, intelligent mitigation and adaptation efforts can help avoid the worst of these – and manage the rest.

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

With UN demographers more certain than ever that global population will reach between 10 and 12 billion by the end of the century, the challenge of building a sustainable future seems daunting. But according to Wolfgang Lutz, founding director of the Vienna-based Wittgenstein Center for Demography and Global Human Capital, these projections miss one crucial variable: increasing levels of education. [Video Below]

The culmination of five years of work by three working groups comprising hundreds of scientists around the world, the Intergovernmental Panel on Climate Change’s Fifth Assessment was released in parts throughout this year. A newly released synthesis presents their findings in one document.

A series of executive orders signed by President Obama since his first year in office requires all federal agencies to begin planning for climate change and produce an updated adaptation plan by May of this year. The Pentagon is a little late, but today they released their second-ever climate roadmap.

Much of the time, discussion about climate change is focused on the future – How bad will it be? Will it lead to more conflict? Who will be most vulnerable? But it is in fact a current phenomenon. The climate system is already, for all intents and purposes, irrevocably changed and millions of lives have been changed along with it.