<prompt> Translate the following text to EnglishKwa sababu moja, Kitabu cha Dunia Katika Usawa kiliandikwa muda mrefu uliopita, na twaweza kudhani kwamba mwandishi wake amejifunza mengi tangu wakati huo.  <response>: For one thing, Earth in the Balance was written a long time ago, and we may suppose that its author has learned a lot since then. 