The progress of humanity has been like that of an individual climbing the paths of a steep mountain. At every turn there are fresh dangers and difficulties to be overcome, fresh complications for which the traveler is prepared only by his courage and determination.
But every step takes the traveler higher up, out of the dark valley, toward the light at the top, and every danger overcome makes it easier to deal with the dangers to follow.
In its long fight the human race has encountered many enemies.
At one time in Europe one single epidemic destroyed half of all the population. But we have struggled on; through science we have almost conquered disease, and the plagues of the past are unknown among us.
In olden times brutal superstition, disguised as religion, dwarfed men's minds, punishing, with atrocious cruelty, the crime of independent thought and apparently making impossible any mental growth in the face of bigotry and monstrous persecutions.
But to-day bigotry begins to give place to true religion; the burning alive and protracted torture which disgraced all the religions of Europe until recently have ceased, probably forever.
Mankind in its travels has progressed as far as the stage of independent thought. If a creature still lives that would take the life of another because that other thinks differently from himself he dares not confess his criminal thought.
A few centuries ago the great majority of all human beings were slaves or serfs. The noblest of human brains, those of the Greek philosophers, wrote and lived in the midst of slavery. Even as great a man as Aristotle could not conceive a society based on a non-slave-holding system.
But except in some African jungle, here and there among savage and semi-savage races, no man is a slave now. And where slavery does exist it exists in stagnant pools of humanity, and it exists side by side with the other monsters, cruel superstition and widespread disease, that progressive humanity has left behind. ——
Every century of which the history has been preserved shows us its horrid side of life, its cruelties, its sufferings without number. But each succeeding century shows also some one point gained, some one hideous feature of life eliminated.