In this program, John McWhorter, author of The Power of Babel: A Natural History of Language; Lyle Campbell, of the University of Utah; Brian Joseph, of The Ohio State University; and population geneticist Luigi Luca Cavalli-Sforza examine factors that contributed to the diversification and spread of languages, including early migration, the introduction of agriculture, and genes. Language transfer from mother to child and from one population to the next is also investigated, along with the concept of dialects and commonalities among the worlds more than 6,000 languages.

This program travels the globe as it surveys a large portion of the worlds languages—25 percent of which are spoken by a mere 0.1 percent of the Earths population. Moving from Africa to Oceania and up to Asia and then west to Europe and across the ocean to the Americas, the program assesses how many languages are spoken in each region, the characteristics they share, and misconceptions about them. Historical background on some of the key languages of the regions is included as well.

Writing is a relative latecomer to the history of language. This program tracks its emergence in Mesopotamia, China, and Mesoamerica and its down through the millennia via conquest—usually violent, sometimes benign—and colonization. The creation of creoles and pidgins resulting from the interaction of specific populations is also addressed, and speculation is made about the first things to be written down. Noam Chomsky; Peter , coeditor of The Worlds Writing Systems; the Manhattan Institutes John McWhorter; MITs Michel DeGraff; and Salikoko Mufwene, of The University of Chicago, contribute.

It is predicted that within a century more than half of the worlds languages will become extinct, but as languages are lost, new ones emerge naturally or are constructed. In this program, Noam Chomsky; Esperantist Thomas Eccard; endangered languages researcher Peter Ladefoged, and others provide insights into the language life cycle. Topics include constructed languages such as Esperanto, language endangerment and preservation, and the role of globalization in language obsolescence. The experts also discuss current language trends and offer their opinions on which languages may emerge as front-runners in the future.