But if spiritual progress in time in this world means progress achieved by individual human souls during their passages through this world to the other world, in what sense can there be any spiritual progress over a time-span far longer than that of individual lives on Earth, and running into thousands of years, such as that of the historical development of the higher religions from the rise of Tammuz-worship and the generation of Abraham to the Christian era?

I have already confessed my own adherence to the traditional Christian view that there is no reason to expect any change in unredeemed human nature while human life on Earth goes on. Till this Earth ceases to be physically habitable by man, we may expect that the endowments of individual human beings with original sin and with natural goodness will be about the same, on the average, as they always have been as far as our knowledge goes. the most primitive societies known to us in the life or by report provide examples of as great natural goodness as, and no lesser wickedness than, the highest civilizations or religious societies that have yet come into existence. There has been no perceptible variation in the average sample of human nature in the past; there is no ground, in the evidence afforded by History, to expect any great variation in the future either for better or for worse.