This is something that is going to happen very quickly: You have a forest full of plants. These plants have insects living in their roots which are feeding on

This is something that is going to happen very quickly: You have a forest full of plants. These plants have insects living in their roots which are feeding on them. At some point in time, insects arrive and settle on the leaves of the plants. They start feeding, and the plants die on or two weeks later. So these insects move to other plants nearby - soon, all the plants in the field are dead, and then all the insects in the field are dead. But let's say there is a single insect underground that feeds in such a way that the chemical composition of the plant is mildly changed from the standard plant. The above ground insects will avoid this plant, because it smells a bit different, and so this plant will be one of the last to die. As a result, it will be the dominant plan in the next generation of plants. In the next generation, the plant that emphasizes this trait will continue to win, and in a few generations, the evolution will occur. This ties in with my theory that evolution can only occur under very high pressure, and it happens very suddenly. This slow evolution theory that is common now is wrong, in my opinion. I believe that mutation is common, but singificant changes happen only under immense pressure. That's why humans are no longer evolving. That's why women still have to suffer at childbirth - midwives have removed the pressure.