As many micro-credit schemes across the world can testify, investment in women is the best investment for the future.

A deal must include an equitable global governance structure. All countries must have a voice in how resources are deployed and managed.

The clear and present danger of climate change means we cannot burn our way to prosperity. We already rely too heavily on fossil fuels. We need to find a new, sustainable path to the future we want. We need a clean industrial revolution.

To measure the success of our societies, we should examine how well those with different abilities, including persons with autism, are integrated as full and valued members.

Achieving gender equality requires the engagement of women and men, girls and boys. It is everyones responsibility.

For my generation, coming of age at the height of the Cold War, fear of nuclear winter seemed the leading existential threat on the horizon. But the danger posed by war to all humanity-and to our planet-is at least matched by climate change.

Saving our planet requires you to be ambitious in what you aim, and, equally, in how hard you work to reach your goal.