This is a fruitful period of experimentation and debate in Cuba. It is now almost seven years since Raúl Castro replaced his brother Fidel, first as interim president in 2006 and then as president in 2008. Under Raúl, the country is taking steps to transform the economy, and a critical discussion is erupting over the dismantling of the authoritarian Communist model.

Cubans see their urban agriculture movement as a possible solution as the world begins to grapple with increasing prices and demand for food and fuel. Many other countries have begun to use the Cuban experience as a model as locally grown, organic produce becomes more popular worldwide.

In his new book, "Revolutionary Doctors: How Venezuela and Cuba Are Changing the World’s Conception of Health Care," author Steve Brouwer highlights the revolutionary health care practiced by Venezuela and Cuba. In this interview, Brouwer describes his new book and explains how these experiences are a road map to "a new kind of society."