Iain McIntyre on how an Australian activist strategy crossed borders Environmental Blockades: Obstructive Direct Action and the History of the Environmental Movement , by Iain McIntyre, London and New York, Routledge, 2021, 274 pp., $AU59.19 (pbk), $AU201.60 (hbk), $AU53.59 (ebook), ISBN: 978-0-3674-8055-4. Publisher’s website: https://www.routledge.com/