if he, however, had not let himself be crucified, something much worse would have happened - in that case the world would have received no fundamental demonstration of the way in which even the greatest sufferings are born by a highly developed being, and the human race would not have developed so far as it has now.

How would the previous sentence be correctly capitalized?
If he, however, had not let himself be crucified, something much worse would have happened - in that case the world would have received no fundamental demonstration of the way in which even the greatest sufferings are born by a highly developed being, and the human race would not have developed so far as it has now.