Note: I originally published this post in July 2022, but I removed it after being asked to do so by biosecurity experts who viewed it as an infohazard. However, recent discussions in the biosecurity field have resulted in a new consensus that it’s better to talk about this issue openly, so I am re-publishing this post. For further reading I recommend this perspective article, published today in Science, as well as a companion piece in Asimov Press.The nanotechnologist Eric Drexler popularized th...