Historical memory is often short, and perhaps nowhere more so than in scientific research. As scientists chase new insights and novel tools, they are rarely rewarded for possessing deep knowledge of their disciplines' past trajectories. Textbook sidebars spotlight singular individuals or celebrated experiments, and institutional accounts highlight founders and funders. Such highlights introduce a tiny-and unrepresentative-fraction of scientific work. Yet, the possibilities and pitfalls of today's research are conditioned by the past.Our contention in bringing together this special issue is that examining the history of plant science and technology is essential to the goals of Plants, People, Planet-that is, to the development of cross-disciplinary approaches in the plant sciences that will foster the insights and energy necessary to tackle the global social and environmental challenges of the present (Hiscock et al., 2023). As the contributions highlight, attention to history can serve many agendas: guiding breeding programs, shaping conservation strategy, tempering expectations for extension work, informing public policy, highlighting the continued legacies of colonialism, and more. It can also serve as the glue that brings researchers from different disciplines into conversation. In this issue, readers will encounter historical accounts (co-) developed by agroecologists, anthropologists, biologists, breeders, development experts, historians, sociologists, and scholars of science and technology studies (STS). Though the contributions traverse many decades and continents, their shared terrain is the archive of past plant science and technology, whether inscribed in books and written records, genes and landscapes, or memories and oral traditions.Our cross-disciplinary histories center on another crossdisciplinary domain: crop science. The study of plants we use as food and fodder (and fuel and fiber, too, though they do not come in for scrutiny in this collection) has played an outsized role in exploring and promoting solutions to the challenges of feeding the world. Over many decades, researchers with expertise in fields such as agronomy, genetics, plant physiology, crop ecology, and biotechnology have reconfigured genes, fields, and ecosystems to extend the biophysical limits of food and fodder production. The outcomes of this work are