This selection of Trudgill's major works since 1988, appearing here in updated and revised form, reveals major recurring themes in his work on linguistic diversity. This book evinces his deep concern that the world's linguistic diversity is diminishing at an alarming rate. The linguistic future is likely to be very different from the past, because increased language contact among people will result in the creation of fewer new languages to balance the language deaths. The essays here manifest Trudgill's conviction that linguists must make every effort to study minority languages and dialects before they vanish. The book also demonstrates his sense of obligation that linguists have to educate the public about why linguistic diversity is valuable.