Far, neither woman nor child, hung back from the rest. She nibbled on a root and waited as events unfolded.

Some of the adults had brought volcanic pebbles from the nearby stream. Now men and women began briskly to knap the pebbles, their hands working rapidly, their fingers exploring the stone. The tools emerged from the stone without real conscious effort — this was a skill that was already ancient, embedded in a self-contained section of a rigidly divided mind — and within a few minutes they had fashioned crude but serviceable choppers and cutting flakes. As quickly as each tool was finished its manufacturer fell on the eland.

The skin was sliced open from anus to throat, and pulled briskly off the carcass. The hide was discarded; nobody had thought up a use for animal skins, not yet. Now the carcass was briskly butchered, with the fine stone blades slicing into joints to separate the limbs from the body, through the rib cage to expose the soft, warm organs within, and then into the meat itself to separate it from the bone.

It was a fast, efficient, almost bloodless affair, a skillful butchering born of generations of ancestral learning. But the butchers did not work together. Though they deferred to Brow, allowing him to take the prime cuts and to extract the heart and liver, they competed as they scavenged the corpse, grunting and prodding at each other. Despite the tools in their hands, they worked at the eland like a pack of wolves.

Few of the women fought for the meat. Their unglamorous scavenging in the acacia grove and elsewhere had been successful today, and their bellies, and those of their children, were already full of figs, grewia berries, grass shoots, roots — fruits abundant in these dry lands that did not require much preparation before eating.

When most of the meat had been taken from the eland’s bones, the bargaining began in earnest. Brow stalked among the men with a blade in one hand and a mighty slab of haunch in the other. He sliced off chunks of the meat and handed them to some of the men — and not to others, who turned away as if it were unimportant, but who would later try to snatch bits of the best meat from the rest. It was all part of the endless politicking of the men.

Then Brow walked among the women, handing out bits of meat like a visiting king. When he reached Calm, he paused, his erection proud, and sliced off a large and succulent slab of eland haunch. Sighing, she accepted it. She ate some of it quickly, then put the rest to one side, close to her infant, who was asleep in a nest of dead grass. Then she lay on her back and opened her thighs, and held up her arms to accept Brow.

Brow hadn’t gone hunting primarily to bring food to his people. Large game provided maybe only a tenth of the group’s intake; the vast majority of it came from the plants, nuts, insects, and small game foraged by the women and older children as much as by the men. Large game was a useful emergency food supply in hard times — drought or flood, perhaps, or in tough winters. But hunting was useful to the hunter in a whole range of ways. With his eland meat Brow was able to reinforce his political position among the men — and buy access to the women, which was ultimately the only purpose of his endless battle for dominance.

With their greater intelligence, tall, hairless bodies, and rudimentary language, these were the most human creatures yet to exist. But much of the way they ran their lives would have been immediately familiar to Capo. Brow’s ancestors had fallen into this social pattern — of males fighting for dominance, of females linked along bloodlines, of hunting to buy favors — far back in time, long before Capo’s fateful decision to leave his pocket of forest. There were other ways for primates to live, other kinds of societies that could be imagined. But once the pattern had been set, it was all but impossible to break.

Anyhow the system worked. The food was shared out; the peace was kept. One way or another, most people got fed.

When Brow was done Calm wiped her thighs with a leaf and returned to the meat. She used a discarded stone flake to slice it up, and handed some to her mother — who was too old to be of interest to Brow — and gave the rest to Far, who fell on it eagerly.

And later, as the light faded, Brow approached Far herself. She saw him as a tall, beefy silhouette against the sky’s fading red purple. Most of his eland meat was gone now, but she smelled its blood on him. He carried a foreleg bone. He crouched down before her, sniffing her curiously. Then he slammed the bone against the rock, cracking it. She could smell its delicious marrow, and her mouth filled with saliva. Without thinking she reached for the bone.

He held it back, making her come closer.

As she approached she could smell him more clearly: the blood, the dirt, the sweat, and a lingering stink of semen. He relented and gave her the bone, and she pushed her tongue into the marrow, sucking at it eagerly. As she ate he put his hand on her shoulder and ran it down her body. She tried not to flinch when he explored her small breasts, pulling her nipples. But she squealed when his probing fingers parted her legs. He drew back his hand and sniffed her scent. Then, evidently deciding she had nothing to sell him, he grunted and moved away.

But he left her the marrow. Eagerly she devoured it, finishing most of it before the bone was stolen from her by an older woman.

The light leached quickly out of the sky. All across the savannah the predators called, marking their bloody kingdoms in their ancient way.

The people gathered on their island of rock. All of them felt a shiver of apprehension as they huddled together — children at the center, adults with their backs facing outward — and prepared to enter a long night of unbroken darkness. They ought to be safe here, in this inhospitable place: any ambitious predator would have to leave the ground and clamber up here, where it would face smart, large, and armed hominids. But there was no guarantee. There was a saber-tooth around called dinofelis, an ambush predator like a stocky jaguar, that specialized in killing hominids. Dinofelis could even climb trees.

As the darkness fell, the people went about their business. Some fed. Some tended to their bodies, digging dirt out of toenails or fingering blisters. Some worked on tools. Many of these activities were repetitive, ritualistic. Nobody was truly thinking about what they were doing.

Some groomed: mothers with infants, siblings, mates, women, and men reinforcing their subtle alliances. Far worked on her mother’s dense head hair, teasing out knots and pulling it into a kind of plait. Even now hair needed a lot of work — it would tangle, mat, and attract lice, all of which needed fixing.

These people were the only species of mammal whose heavy hair was not self-maintaining; the spectacular tonsorial plumage of some monkeys, for instance, just grew that way. Far’s hair even needed cutting regularly. But people’s hair had developed that way because they needed something to groom. Out here on the savannah it paid to be part of a large group, and the group needed social mechanisms to hold itself together. There wasn’t time now for the old ape ways, the elaborate full-body grooming indulged in by Capo and his ancestors. Anyway you couldn’t groom skin that had become bare so it could sweat. But still, in this primitive hairdressing, they retained links with their heritage.

The grammar of the people as they went about their diverse activities was not like that of a human group. In the gathering dark they huddled together for protection, but there was no real sharing. There was no fire, and nothing like a hearth, no central focus. They looked human, but their minds were not like humans’.

Just as in Capo’s time, their thinking was rigidly compartmented. The main purpose of consciousness was still to help people figure out what was in each others’ minds: They were only truly self-aware in the human sense when dealing with each other. The boundaries of awareness were much more narrow than in human minds; there was much beyond, out in the darkness, that they did essentially without thinking about it. Even those making tools or working on food did so wordlessly, their hands working impulsively, with no more conscious control than lions or wolves. Their awareness at such times was rolling, fleeting. They made tools as unconsciously as humans would walk or breathe.