Was this "Weltschmerz," which we thought a malady of our day, endemic in Persia in 1100?

Unable to find enemies to keep their numbers down, exempt from the epidemics and endemics of Europe and Asia, unacquainted with the contraceptives known until recently only by our rich, but now preached by organized societies to the humblest, the Tahitian, Marquesan, and Hawaiian came to consider the blotting out of lives just begun worthy deeds.