Both law and science went through revolutionary changes in England in the first half of the seventeenth century, a period of pandemic, conflict, and climate change. The circle of Samuel Hartlib (c. 1600–62) sought a way to regenerate society through reform and innovation. One member of the circle was Sir Cheney Culpeper (1601–66), a barrister and landowner, whose correspondence shows an attempt to synthesize law and natural philosophy into a coherent vision of regeneration. He wrestled as much with how change (...) could be achieved as with what changes would be beneficial. He sought a mutually beneficial relationship between humanity and nature. He urged self-restraint to avoid the abuse of power, political and technological. His most practical and influential work was in agriculture. Paradoxically, however, the efforts of Culpeper and his circle to address the crises of their times have arguably created the very crises of ours. We are, moreover, in what Culpeper describes as a ‘crisis of time’. This essay poses the question as to whether, given the urgency of our situation, we might learn from Culpeper’s generation that regeneration requires revolution as well as reform. (shrink)