"But," you may ask, "why can't the other elephants behind him also stop and eat up all the leaves on the trees near them?"
Because then all the trees on that line of march would be bare of leaves, and it might take a whole month for fresh leaves to grow there again. But if the herd took only a portion of the leaves from each tree, there would be enough food for them along that path if they happened to visit it again in a few days.
In fact, the elephants need make only a few such paths through the jungle, if they eat only part of the leaves at a time along any of the paths. Then they can visit these paths in turn on other days, and always find enough food there—because the fresh leaves constantly growing on the trees would make up for the small portion they had eaten.
So you understand how wise the elephants are in having that law in the herd.
"But," you may say, "if they were to eat all the leaves on a tree, their path would be a short one; while if they eat only a portion of the leaves, their path would be much longer, as they must nibble from many more trees to satisfy their hunger."
That is quite true. But there is no advantage in having a short path, because at the end of their march in search of food they must find water to drink, as I have already told you—and they may have to go several miles to reach the nearest stream. So they might as well nibble from the trees all the way to the stream, especially as elephants can easily march ten or twelve miles in that manner every day.
Besides, after taking a bunch of leaves from a tree, they must chew it before taking the next bite; so, meanwhile, they might just as well walk on to the next tree. In fact, if they have not quite finished chewing, most elephants pass by one or two trees before taking the next bite. That shows how really wise they are. For then they are sure of finding enough food along that path when they visit it again a few days later.
It is the president of the herd who sets a good example to the others in doing all these wise things. As he walks at the head of the line, he sees at a glance what is the best thing to do in that particular path, whether to nibble a little from every tree, or to pass by a few trees without nibbling from them at all. And whatever he does, all the other elephants do after him.
My dear children, it is exactly the same among us. When food is scarce in a country and people must be careful, then it is the President who tells us how to portion out the food supply in the country. Otherwise, some people would be wasteful and throw food away—and others would not have enough to eat.
It is very important to learn from your childhood to be careful of food. Do you know that in the United States every man, woman, and child on an average throws away every year seven dollars' worth of food on the plate? That would be enough to feed all the people in the poorhouses and the hospitals.