Behaviourism

It follows that humans, people and knowledge are not only objectively significant: they are by far the most significant phenomena in nature – the only ones whose behaviour cannot be understood without understanding everything of fundamental importance. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

Using our explanations, we ‘see’ right through the behaviour to the meaning. Parrots copy distinctive sounds; apes copy purposeful movements of a certain limited class. But humans do not especially copy any behaviour. They use conjecture, criticism and experiment to create good explanations of the meaning of things – other people’s behaviour, their own, and that of the world in general. That — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

The Easter Islanders’ culture sustained them in both senses. This is the hallmark of a functioning static society. It provided them with a way of life; but it also inhibited change: it sustained their determination to enact and re-enact the same behaviours for generations. It sustained the values that placed forests – literally – beneath statues. And it sustained the shapes of those statues, and the pointless project of building ever more of them. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

I have mentioned behaviourism, which is instrumentalism applied to psychology. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

Given a sufficiently precise description of the initial state of any isolated physical system, it would in principle predict the future behaviour of the system. Where the exact behaviour of a system was intrinsically unpredictable, it would describe all possible behaviours and predict their probabilities. In practice, the initial states of interesting systems often cannot be ascertained very accurately, and in any case the calculation of the predictions would be too complicated to be carried out in all but the simplest cases. — David Deutsch, The Fabric of Reality: Towards a Theory of Everything

The reason why higher-level subjects can be studied at all is that under special circumstances the stupendously complex behaviour of vast numbers of particles resolves itself into a measure of simplicity and comprehensibility. This is called emergence: high-level simplicity ‘emerges’ from low-level complexity. — David Deutsch, The Fabric of Reality: Towards a Theory of Everything

I have argued that the laws of nature cannot possibly impose any bound on progress: by the argument of Chapters 1 and 3, denying this is tantamount to invoking the supernatural. In other words, progress is sustainable, indefinitely. But only by people who engage in a particular kind of thinking and behaviour – the problem-solving and problem-creating kind characteristic of the Enlightenment. And that requires the optimism of a dynamic society. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

In early prehistory, populations were tiny, knowledge was parochial, and history-making ideas were millennia apart. In those days, a meme spread only when one person observed another enacting it nearby, and (because of the staticity of cultures) rarely even then. So at that time human behaviour resembled that of other animals, and much of what happened was indeed explained by biogeography. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World

It would be much truer to say that the landscape we live in is the product of ideas. The primeval landscape, though packed with evidence and therefore opportunity, contained not a single idea. It is knowledge alone that converts landscapes into resources, and humans alone who are the authors of explanatory knowledge and hence of the uniquely human behaviour called ‘history’. — David Deutsch, The Beginning of Infinity: Explanations That Transform the World