By Glenn Dromgoole Former Abilenian Dr. Leonard Allen, dean of the College of Bible and Ministry at Lipscomb University in Nashville, is co-author with John Mark Hicks of A Wild Democracy, the first  in a planned three-volume history of the Churches of Christ in the 20th Century. The book, published by Abilene Christian University Press (192 pages, $19.99 paperback), covers the period