One of the earliest (if not the first) American treatments of post-modern theology, this volume gives the foundation for such now popular authors as Brian McLaren, Rob Bell, et al.
Hall's thesis (1976) is that the American church has largely been dominated by the relentless optimism of the American Empire and now is helpless to cope with the looming sense of darkness in the American spirit brought on by crises such as Vietnam and Watergate. America, he writes, is only now beginning to deal with the darkness in a way that Europe has been doing since WWI. There is, however, in Hall's view, a "thin tradition" of spiritual honesty in the Church and he traces it from Paul through Luther, Kierkegaard, and Barth, with lesser reference to Bonhoeffer and Tillich.
Ultimately, Hall proposes a new basis for American theology building off what he saw as positive stirrings in the then-current culture: the peace movement and back-to-nature leanings of the "hippie" youth culture and the more mainstream ecological movement. In these, he saw the possibilities of a theology that redefined human relationships to the Creator, to creation/nature, and among humans. Most importantly, Hall sees the need for a popular theology that goes beyond "happy talk" to confess the darkness of human nature and the universe.
While some of this book seems necessarily dated, "Lighten Our Darkness" was a necessary bridge between the relentless optimism of the populist theologies of Norman Vincent Peale and Billy Graham to today's authors cited above. Hall has continued to write with what he has announced as his last book (he is 84) coming out just this year. I will certainly be looking for more of his books to "catch up." He has been ranked as one of the "25 theologians to broaden your faith" by the UC (United Church of Cananda) Observer along with such current writers as Borg, Crossan, Brueggeman and Wright.