From at least 3.4 million years ago to historic periods, humans and their ancestors used stone as the raw material for tool production. Archeologists find stone tools on all the planet’s habitable landmasses, even in its cold and ecologically sparse Arctic regions. Their ubiquity and durability inform archeologists about important dimensions of human behavioral variability. Stone tools’ durability also gives them the ability to contribute to the study of long-term historical processes and the deeper regularities and continuities underlying processes of change. Over the last two millennia as ceramics, livestock, European goods, and eventually Europeans themselves arrived in southern Africa, stone tools remained. As social, environmental, economic, and organizational upheavals buffeted African hunter-gatherers, they used stone tools to persist in often marginal landscapes. Indigenous Africans’ persistence in the environment of their evolutionary origins is due in large part to these “small things forgotten.” Stone tools and their broader contexts of use provide one important piece of information to address some of archaeology and history’s “big issues,” such as resilience in small-scale societies, questions of human mobility and migrations, and the interactions of humans with their environments. Yet, stone tools differ in important ways from the technologies historians are likely to be familiar with, such as ceramics and metallurgy, in being reductive. While ceramics are made by adding and manipulating clay-like substances, stone tools are made by removing material through the actions of grinding, pecking, or fracture. Metals sit somewhere in between ceramics and stone: they can be made through the reduction of ores, but they can also be made through additive processes when one includes recycling of old metals. Stone-tool technologies can also be more easily and independently reinvented than these other technologies. These distinctions, along with the details of stone tool production and use, hold significance for historians wishing to investigate the role of technology in social organization, economy, consumption, contact, and cultural change.