Who was Leif Ericsson? What exactly happened with the Hindenburg? What is the difference between the Articles of Confederation and the Constitution? Rebecca Nelson's book is a truly handy and convenient book of answers to some of those questions that seem to just go unanswered. By separating her guidebook into sections such as 'Eras and Their Historical Highlights,' 'Exploration & Migration,' 'Government, Law & Politics,' 'Philosophy, Science & Invention,' and 'Religion,' Nelson is able to connect significant events and philosophies together on a logical basis. By grouping important historical events in such a manner Nelson traces the way in which human thought has evolved and moved on to bigger and more complex problems. This book is also split into small sections that are easily read in a short period of time. The segments are independent so that one can flip from one section to the next when searching out answers to specific queries.