THIS SUMMER, 48-YEAR-OLD DYLAN JONES walked into a gallery in his hometown of Caersws, Wales, and was drawn to a collection of photos depicting the olive harvest in a small West Bank village—the gray skies and golden landscapes, the piles of purple olives, the men and women reaching toward the tree branches. A few months later, Jones was on a plane, headed to join a global brigade of volunteers who assist Palestinian farmers during the October-November harvest season.
In the West Bank and Gaza Strip, 45% of agricultural land is planted with olive trees, with the olive-oil industry making up a quarter of the region’s gross agricultural income. Groves are often passed down through families, and the olive tree—which has symbolic value across Islam, Christianity and Judaism—represents peace and resilience…