We have long known that the incidence of autistic spectrum disorder is increasing. It now occurs in just under one in 50 births. One thing we know for sure is that some of the increase is due to better diagnostic procedures. Many children who used to be classified as intellectual disability are now classified as autistic. The spectrum of autism has also expanded so more children are eligible for that diagnosis. However, these things alone do not explain the large increase that we have seen. One thing we do know is that when this kind of thing happens, it is usually multifactorial in nature. That means that there is a genetic predisposition to develop the condition. However, the genetic condition requires a trigger to turn it on. For a number of years pesticides have been suspected as a cause. However, it has been difficult to separate out exposure to pesticides to exposure to other substances. The only study that has been done to suggest a real relationship was done in rats. It is not clear that this is relatable to humans. In the 1990s Monsanto produced crops that were genetically engineered. They had genetics that allowed them to [...]