I set off early, heading for the rocky summit of Jebel Mara.

The rising sun lit the vast granite outcrop overlooking South Sudan’s capital of Juba. The faint trail was engulfed in elephant grass, towering over me as I clawed and sweated my way upward.

I broke free momentarily of the jungle flanking the summit, and found myself face to face with a young South Sudanese man sitting back on his haunches, watching me silently. He was clad only in a pair of filthy shorts, and his muscled torso gleamed with sweat. About him lay a tumble of granite boulders, pitted with the fresh scars of his pickaxe.

We eyed each other for a moment, until his steady gaze broke into a wide grin. ‘I am Moses’ he announced in thick English. I sat next to him, thankful for the respite. The air rang with a rhythmic high-pitched ring of steel against rock, and I realised Moses was not alone.

‘This is how we make money.’ he told me as I peered at his crude tools. Just then the rumble of falling rocks startled me. From the bushes, two men, hard and lean like Moses, strained to roll giant boulders past us, blazing an earthen trail through the grass to the valley floor below.

‘We came to Juba to escape the war. Now we live in the caves.’ He told me simply, pointing to a distant hillside. His face was weathered, his hands gnarled and strong. As he continued I discovered that small bands of men like him lived rough, enduring rain, snakes and mosquitoes, spending their days dragging massive rocks from the face of the Jebel.

I learned that while the men scale the rocky ridges in search of boulders, their women work in the valley below. Their daylight hours are spent breaking the stone down into saleable chunks, painstakingly growing the piles that now line the tracks. It is relentless and backbreaking. Their children scamper amongst the rocks and muddy streams, quick to inspect any passing hawajas (white people) like me.

Moses told me that each pile sells for about one hundred dollars. This seemed to me a reasonable sum, until he mentioned that it takes at least two weeks to gather enough stone into a pile. And it might take up to three months to sell a single pile to any of the local businessmen – who sell the stone onto foreign construction companies at a hefty margin.

It dawned on me that this was truly a sentence of hard labour. There are no welfare programmes in South Sudan. No support for people displaced by fighting. No pension schemes, and very few jobs. If a family’s granite doesn’t sell, their only option is to head back up the hill and keep digging. Snakebite, malaria or injury would leave them with few prospects.

I realised that this is the nature of livelihoods in South Sudan. For some, this is what it now means to ‘earn a living’. Many of these same families survived years of conflict, constantly moving, living in the bush. The men no doubt carried weapons and most likely took some part in the war. And as I descended from the summit of Jebel Mara later that day, I wondered if perhaps some of them would rather still be there now.