"The Heap Relativists claim that their philosophy may help prevent future disasters like the Great War of 1957, but it is widely considered to be a philosophy of despair.
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This should read that they claim their philosophy may prevent the destruction of correct pebble piles, as happened in the 1957 war. Otherwise, good.
Well, right, when one speaks of the disaster of war, the first thing that comes to mind is of course the senseless and wanton scattering of perfectly correct pebble piles. Further thought reveals other problems, such as a reduced population leading to fewer future correct pebble piles and so forth, but that's not the visceral image that you get when contemplating the horrors of war.
"The Heap Relativists claim that their philosophy may help prevent future disasters like the Great War of 1957, but it is widely considered to be a philosophy of despair. "
This should read that they claim their philosophy may prevent the destruction of correct pebble piles, as happened in the 1957 war. Otherwise, good.