From this simple origin, then, the whole vast difference of right and left in civilised life takes its beginning.  At first, no doubt, the superiority of the right hand was only felt in the matter of fighting.  But that alone gave it a distinct pull, and paved the way, at last, for its supremacy elsewhere.  For when weapons came into use, the habitual employment of the right hand to grasp the spear, sword, or knife made the nerves and muscles of the right side far more obedient to the control of the will than those of the left.  The dexterity thus acquired by the right—­see how the very word ‘dexterity’ implies this fact—­made it more natural for the early hunter and artificer to employ the same hand preferentially in the manufacture of flint hatchets, bows and arrows, and in all the other manifold activities of savage life.  It was the hand with which he grasped his weapon; it was therefore the hand with which he chipped it.  To the very end, however, the right hand remains especially ‘the hand in which you hold your knife;’ and that is exactly how our own children to this day decide the question which is which, when they begin to know their right hand from their left for practical purposes.

A difference like this, once set up, implies thereafter innumerable other differences which naturally flow from it.  Some of them are extremely remote and derivative.  Take, for example, the case of writing and printing.  Why do these run from left to right?  At first sight such a practice seems clearly contrary to the instinctive tendency I noticed above—­the tendency to draw from right to left, in accordance with the natural sweep of the hand and arm.  And, indeed, it is a fact that all early writing habitually took the opposite direction from that which is now universal in western countries.  Every schoolboy knows, for instance (or at least he would if he came up to the proper Macaulay standard), that Hebrew is written from right to left, and that each book begins at the wrong cover.  The reason is that words, and letters, and hieroglyphics were originally carved, scratched, or incised, instead of being written with coloured ink, and the hand was thus allowed to follow its natural bent, and to proceed, as we all do in naive drawing, with a free curve from the right leftward.

Nevertheless, the very same fact—­that we use the right hand alone in writing—­made the letters run the opposite way in the end; and the change was due to the use of ink and other pigments for staining papyrus, parchment, or paper.  If the hand in this case moved from right to left it would of course smear what it had already written; and to prevent such untidy smudging of the words, the order of writing was reversed from left rightward.  The use of wax tablets also, no doubt, helped forward the revolution, for in this case, too, the hand would cover and rub out the words written.