20 years ago I co-wrote a survey of behavioural policy options, that was then published by the UK Cabinet Office. It's now disappeared from the government websites and the Internet so here is the version of it I did a few years later in my book 'The Art of Public Strategy'. It tried to take a fairly comprehensive and systemic view. It should be read alongside the very useful accounts of work by BIT and more recent books like Damon Centola's work on behaviiour change. Much of