I have never liked wasps and indeed I have never thought that they had any value or purpose. But in fact they are remarkably useful. For almost every insect that we think of as a real pest there is a wasp that has evolved to keep it under control. This can be just by eating their prey or laying eggs in the bodies of their insect prey in a parasitical way. I feel moderately better about wasps now, but I’ll still never like them!