Unit One From Competence to Commitment 1
Unit Ttwo Family Business： the Next Generation 24
Unit Three An American Love Affair 51
Unit FOur The No-child Family： Going Against100，000 Years of Biology 71
Unit f ive Sandwich Generation 97
Unit Six Getting Along with Nature 116
Unit Seven The Virtues of Ambition 143
Unit Eight The Harm That Good Men Do 170
Unit Nine Let the Computers Be the Bureaucrats 203
Unit Ten Animal Research Is Vital to Medicine 224
Unit Eleven Should English Be the Law？ 248
Unit Twelve Rich North， Hungry South 277