Covering the entire lean and agile history without touching on the work of Alistair Cockburn is missing some depth. He was on the list of Agile Manifesto signer

Covering the entire lean and agile history without touching on the work of Alistair Cockburn is missing some depth. He was on the list of Agile Manifesto signers and gave us Crystal and the Seven Properties. More than a thousand citations is evidence that Alistair's work was novel and established consensus: https://www.researchgate.net/profile/Alistair-Cockburn/publication/234820806_Crystal_clear_a_human-powered_methodology_for_small_teams/links/56d434b508ae2ea08cf8e07a/Crystal-clear-a-human-powered-methodology-for-small-teams.pdf https://www.researchgate.net/profile/Alistair-Cockburn/publi... See Chapter 2. Many of these methods were practiced by my team in Boston in the late 90's without the jargon. The results set the stage for how we'd work years later.