"India and Pakistan are so often at odds that there is a tendency to shrug off their spats, but not since their most recent, full-blown war in 1971 has the risk of escalation been so high." Can anyone restructure the part after "but" to make it more clear? The meaning of the latter part is not so clear for me. Thanks.
"... but the risk of escalation has not been so high since their most recent, full-blown war in 1971 ."
The inversion of the verb is intended to put "so high" at the end of the sentence to signal that it is the point of the message.