“In mechanical terms, humans are quite efficient converters of food into energy, so human slaves were often more valuable than animal slaves, if one could afford them.21 The importance of human beings as a source of energy helps explain why… — David Christian Copy Share Image
“It was possible to borrow British technology, and increasingly governments began to promote development. By the end of the nineteenth century, governments and large… — David Christian Copy Share Image
“the conquests of the Achaemenid and Hellenistic dynasties encouraged commercial and intellectual exchanges reaching from central Asia to India to the western Mediterranean. In… — David Christian Copy Share Image
“So, as networks expand in size, their potential intellectual synergy increases much faster: “larger and denser populations equal faster technological advance.” — David Christian Copy Share Image
“typical modern households live in urban environments where they earn incomes through some form of wage work and buy food produced by others. In… — David Christian Copy Share Image
“no complex, nonlinear system can be adequately described by dividing it up into subsystems or into various aspects, defined beforehand.” — David Christian Copy Share Image
Every kid goes to school full of questions about meaning. You know, 'What's my place in the universe? What does it mean to be… — David Christian Copy Share Image
“Both animal and human slaves could be controlled best if kept economically and psychically dependent on their owners.” — David Christian Copy Share Image
“The modern world is ruled by larger and more impersonal forces, from faceless bureaucracies to abstractions such as “inflation,” or “the rule of law.”… — David Christian Copy Share Image
“contain into new, durable configurations, which can handle huge energy flows without disintegrating. This, we will see, is the characteristic pattern of all such… — David Christian Copy Share Image
We, as extremely complex creatures, desperately need to know this story of how the universe creates complexity and why complexity means vulnerability and fragility. — David Christian Copy Share Image
If, in schools, we keep teaching that history is divided into American history and Chinese history and Russian history and Australian history, we're teaching… — David Christian Copy Share Image
An egg is a beautiful, sophisticated thing that can create even more sophisticated things, such as chickens. And we know in our heart of… — David Christian Copy Share Image
