150 years ago, in May 1873, work began on developing the breakthrough design for mass-produced barbed wire, with wide-ranging (pun intended) implications for agriculture, society, and warfare. Links and notes for ep. 470 (PDF): http://arsenalfordemocracy.com/wp-content/uploads/2023/05/AFD-Ep-470-Links-and-Notes-Barbed-Wire.pdf Theme music by Stunt Bird.