The wonderful, work-based, affluence-inducing, effects of low marginal tax rates is not the only fundamental economic principle that Ibn Khaldun got right.
The precautionary principle states that, if there is uncertainty regarding the effects of exposure to an agent, the burden of proof that exposure does not cause harm falls on those who utilize the agent.
While this does not prove that the same principle works in humans, or that a drug could be developed to harness this without side-effects, the researchers described the work as a "major breakthrough".