American lawyer Kimberley Motley is the only Western litigator in Afghanistan's courts; as her practice expands to other countries, she thinks deeply about how to build the capacity of rule of law globally.

With its air-filtering plants and sustainable architecture, Kamal Meattle's office park in New Delhi is a model of green business. Meattle himself is a longtime activist for cleaning up India's air.

TED Senior Fellow Burçin Mutlu-Pakdil studies extreme objects -- including a rare double-ringed elliptical galaxy she discovered -- to help us understand how galaxies form and evolve.

In her book "Gamestorming," Sunni Brown shows how using art and games can empower serious problem-solving.