Which do you think was the more important technological advancement---the rickshaw or the jumbo jet? The condom or the contraceptive pill? Perhaps the answers are not as obvious as you might first think ... In 'The shock of the old: technology and global history since 1900', well known historian of modern military and industrial technology David Edgerton challenges the idea of technology as a glistening behemoth, frog-marching us ever forward into a bigger, better, brighter, faster, future. Reviewer Jock Given takes a closer look for 'The Book Show'.