Complete order would prevent adaptive changes; unconstrained disorder would render self-organisation impossible.146 The so-called ‘edge of chaos’, where chaos and order are maximally present to one another, is the most fruitful condition of an open system, including the creative potential of the human brain.147 As Nassim Nicholas Taleb argues in his book Antifragile, a certain vulnerability is bound up with the potential to survive: the attempt to do away with it leads to extinction.