Two items come to my mind, stupefied.
There are a series of slim books, published by Penguin, by Colin McEvedy. The one on my desk right now is titled
The Penguin Atlas of Medieval History. Each concise, but informational, section is accompanied by a map showing political maps at key dates, language groups and population migrations, trade routes and goods, etc. The maps make it very easy to get a grip on what's what in any given period, and scanning all the maps in one of the volumes will give you a good base for understanding the changes.
atlas
Another book that may be helpful to you is Kenneth Clark's
Civilisation, an easy and entertaining read. It is eurocentric and based on art but, until the modern era, art was a close reflection of the socio-political happenings of the day.
Other than that, as Sturgis said
Quote:Read. Read. Read. Read some more.