not, as a race, madmen or morons, to take full advantage of any new medium or method that presents itself for the safeguarding of peace on earth, for the furtherance of good will to men. Since that red day in June, 1914, when the assassin Gavrilo Princip fired the shot that not only echoed around the world but almost overturned the very pillars of civilization’s temple, two antagonistic tendencies upon the part of mankind have displayed themselves with unprecedented impressiveness. Man’s destructiveness has been raised to the nth power, while his constructive ingenuity has been exhibited in an amazing and encouraging way. The laboratories of the world to-day are solving problems the solution of which places the human race absolutely in control of its own destiny. It may, if it so chooses, commit suicide through high explosives or poison gas, or it may devote itself successfully to the overthrow and annihilation of the Four Horsemen of the Apocalypse, War, Famine, Poverty and Disease. Now what bearing has all this upon the subject-matter of this book, what has a biography of the movie got to do with the choice mankind must presently make between a higher civilization and a return to savagery, between the call of the millennium and the lure of the jungle, between science making earth a paradise and science making earth a hell? If my preceding chapters have not supplied a convincing answer to this query, let me, even though I repeat myself, endeavor, before I bring this labor of love to a close, to formulate a concise, but comprehensive and convincing, answer to a question that future generations may consider the most important that the soul of Man ever asked of the physical universe. Is it not conceivable that posterity will laud us of to-day for inventing the Esperanto of the Eye and marvel at us because we failed to make full use of it to attain that enlightenment which is the _sine qua non_ of our race’s salvation? May not our descendants revere us for inventing the screen, while, at the same time, they mock at us for our delay in taking advantage of its highest possibilities as an ally to progress, as a defense against racial deterioration?