The prosperity of the second half of the twentieth century was both a cause and an effect of social and scientific breakthroughs that have redefined human life. The biggest change is simply that people live longer and have far more freedom to think about things other than staying alive.

What business entrepreneurs are to the economy, social entrepreneurs are to social change. They are the driven, creative individuals who question the status quo, exploit new opportunities, refuse to give up, and remake the world for the better.

According to the management expert Peter F. Drucker, the term "entrepreneur" (from the French, meaning "one who takes into hand") was introduced two centuries ago by the French economist Jean-Baptiste Say to characterize a special economic actor-not someone who simply opens a business, but someone who "shifts economic resources out of an area of lower and into an area of higher productivity and greater yield." The twentieth-century growth economist Joseph A. Schumpeter characterized the entrepreneur as the source of the "creative destruction" necessary for major economic advances.

Much of the criticism of economic globalization has centered on factory labor abuses. But the majority of the world's poor are not employed in factories; they are self-employed - as peasant farmers, rural peddlers, urban hawkers, and small producers, usually involved in agriculture and small trade in the world's vast "informal" economy .

An idea is like a play. It needs a good producer and a good promoter even if it is a masterpiece. Otherwise the play may never open; or it may open but, for a lack of an audience, close after a week. Similarly, an idea will not move from the fringes to the mainstream simply because it is good; it must be skillfully marketed before it will actually shift people's perceptions and behavior.

Every change begins with a vision and a decision to take action.

The prosperity of the second half of the twentieth century was both a cause and an effect of social and scientific breakthroughs that have redefined human life. The biggest change is simply that people live longer and have far more freedom to think about things other than staying alive.