A brief quote from the introduction to the second volume of The Outline of History:
"Another great historian, the late A. J. P. Taylor of Oxford University, confessed that he may have learned more from the Outline, which he encountered as a youth, than from any other book he ever read."
It is hard to disagree. The scope and clarity of this work are remarkable. When Wells situates the Earth in space and life on it in geological time, at the beginning of the first volume, you sense their immensity. When Wells outlines the development of humans from Pithecanthropus to the present, and of human society from Neolithic culture to the League of Nations, you all but see all of it happen. His criticisms of certain historical figures and ideas are fair and reasonable, and when he recounts the histories of people he admires -- again, fairly and reasonably --, of a Jesus of Nazareth or an Asoka, for instance, the prose all but blazes forth.
Recommended reading for everyone.
Incidentally, I listened to rather than read most of this book, though I own both the audio and the paper version. Thus, I recommend not only the books themselves, but also the 1993 Blackstone Audio Books-produced reading, read by Bernard Mayes.