Back in my Yeshiva days I recall my RY quoting the Ramban. Chazal tell us that “Ain puronios bo l’olam ela bishvil Yisroel” (suffering comes to the world because of Yisroel).
If so, what about Sedom. Why were they destroyed? There were no Yisroel around (other than Avrohom, to a certain degree).