Evolution has no aim and it happens on each level of the creation or each level of the so-called “food-chain”. Our decision to be Vegetarians or not is of much less importance than we might hope.
A decision to reduce meat-consumption, on the other hand, will be of much bigger impact than most of us want to know. It is a necessity just like “using energy, when it is available”. This is in contrast to “making available what makes us feel comfortable”.
This cartoon is quite good in many respects. ;-)
John Deering and John Newcombe