Synthetic biology aims to make biology easier to engineer and to program. Thanks to advances in computing power, the ability to make long tracts of DNA, new tools like CRISPR that can be used to edit genomes, and the enthusiasm of young scientists and even amateurs who want to enter the field, synthetic biology is poised to change the future of medicine, agriculture, and manufacturing. Yet, while this new field promises vast opportunities and benefits, there are also risks. There are biosecurity risks that these technologies will be deliberately used for harm; safety risks to people and the...