In The Other Side of the Hedge by E. M. Forster:
“People always are astonished at meeting each other. All kinds come through the hedge, and come at all times—when they are drawing ahead in the race, when they are lagging behind, when they are left for dead. I often stand near the boundary listening to the sounds of the road—you know what they are—and wonder if anyone will turn aside. It is my great happiness to help someone out of the moat, as I helped you. For our country fills up slowly, though it was meant for all mankind.”
What does "for" in the bolded sentence mean? In my comprehension the bolded sentence should mean:"Though our country was meant for all mankind, it still fills up slowly." But then "for" seems out of place.