I've been looking at the work of Dr. William Ruddiman on pre-industrial climate forcing. His research suggests that human activities, like agriculture and deforestation, may have already contributed to long-term warming starting around 8,000 years ago—well before the industrial era. This challenges the idea of a simple long-term cooling trend and highlights how natural and anthropogenic factors can interact in complex ways. [Source](https://www.pnas.org/doi/10.1073/pnas.0703628104)