Humans are remarkable: the first species in almost four billion years of life on earth that dominates the biosphere. This gives us the power, in principle, to build societies in which everyone flourishes. But it also creates great dangers because it is not clear that we really understand how to use our potentially devastating powers.

I think what I was after was a unifying story that could bring everything together, that could give me a sense of the whole of history.

Learning to domesticate the horse was a sort of energy revolution.

David Christian Quotes