The Evolution of Useful Things A Book by Henry Petroski Here, then, is the central idea: the form of made things is always subject to change in response to their real or perceived shortcomings, their failures to function properly. This principle governs all invention, innovation, ingenuity. Spike and sponShaped and reshapedForm follows failureTheir wrongness is somehow more immediateA small corner of the world of things+23 More The evolution of devices formfunctioninventionprogressfailure
So many tactics, so well entrenched I am going to deal with several subjects that, in themselves, are already well recognized as within the province of city planning: subsidized dwellings, traffic, city visual design, analytical methods. These are all matters for which conventional modern planning does have objectives and therefore does possess tactics—so many tactics, so well entrenched, that when their purposes are questioned they are generally justified in terms of the conditions laid down by still other tactics (e.g., We must do this for the purpose of getting the federal loan guarantees). We become the prisoners of our tactics, seldom looking behind them at the strategies. Jane Jacobs, The Death and Life of Great American Cities Lost purposes goals