SEVENTY years ago, the United Nations was formed as the expression of a simple choice: cooperation instead of war. Humanity would stand as one against conflict, poverty and disease. All the world’s voices would be heard.

At least, that was the plan.

We’ve come a long way. We’ve halted and reversed the spread of killer diseases, extended life expectancy and raised incomes. We’ve even walked ourselves back from the edge of some global conflicts and catastrophes. But progress has not been evenly distributed. Too many people have been left outside of a mostly urban, mostly Northern success story.

Seeing that, world leaders put forth a new set of global goals in New York last week. If we want to build a world where not just some but all get to live in security and prosperity, there’s a lot still to do, as the 2030 Agenda for Sustainable Development signed off on by United Nations member states shows.