Polyp is a political cartoonist whose acutely observed works get straight to the heart of things. His is a leftie-liberal environmental agenda, well-informed, unapologetic and humane. "Speechless" is a history of the world in images alone, although cunning use of symbols in speech-bubbles helps to clarify the author's points. Although certain landmark events are highlighted - the Holocaust, Tiananmen, Columbus - the 'history' is more a record of trends: colonial exploitation, corporate control, the endlessly recurring motif of people in the corner of the picture hoping for food. As such, it's a polemic, rather than an academic work.
Despite the limitations Polyp has set for himself, this little book manages to be witty and inventive: there is, for instance, an entire comic-within-a-comic, which we read through the eyes of a guy sat on the toilet! The whole thing is around 100 pages: it can certainly be read in an hour or so (perhaps on the toilet...) and is definitely time well spent.