that's what be tend to be to: education leads people to specialize themselves in a single track. Jobs are more and more focused on a single point of a total job, for exemple, at the begining of the last centurey, a little group could, on his own, build an entire car, each one able to help the other if a prob;lem occurs. Now you have a complete staff focused only to, say, supervized the paint process (which means looking at the computers if nothing goes wrong). you have specialized "castes", like the cilvil servants. It works exactly the same way for the ants. They have warriors, they have scouting parties, they have nurses, they even have varieties that are used as doors to block paths to the queen's room in times of war (they have a very broad head that can obturate a corridor). And they don't birth (sp?) as what they will become (at the exception of sexued/unsexued individuals), they all began has ants able to do everything, then they specializes themselves according to what's needed, their evolution appears through different foods and pheromonal exchanges. It's just another sort of educational, physic rather than pshychic, as ours is.