Populations are\n constantly changing and evolving, and each successive edition of \n this book has aimed to keep up with demographic trends and the explanations\n \n for them. Thus, every chapter of this current edition has been revised for\n recency, \n relevancy, reliability, and readability. At the same time, the teaching and\n learning \n environment has changed substantially over the years, and in this edition,\n I have \n responded to calls from users of the book to reorganize material and reduce\n the \n number of chapters so that everything of vital importance can be readily\n covered in \n one academic term. This edition has only 10 chapters, rather than the 12\n chapters in \n the previous edition, but all of the really good stuff is still in here.\n