Akin to Bacteria?

Dr. Cebra informed us yesterday that rumen bacteria multiply according to the feed stuffs available. They do not care about the ruminant as a whole. This, of course, is rather foolish of them, because unregulated proliferation of certain bacteria can create a rumen environment that is detrimental to the cow, and lead to the cow's demise. This in turn could make tough times for the bacterium as its surroundings begin their translation to dust.
So there I was in class, and I thought "what a delightful object lesson!" People tend to "eat, drink, and be merry," not caring what they may reap in the end. They look out for themselves and disregard the well-being of society, the economy, or the Church -- and the end results are not pretty.