 That filter may lie in the past, if intelligence is much more rare than current biology would predict; or it may lie in the future, if existential risks are even larger than is currently recognized.Closely linked to FHI's work on risk assessment, astronomical waste, and the dangers of future technologies is its work on the promise and risks of human enhancement.The modifications in question may be biological, digital, or sociological, and an emphasis is placed on the most radical hypothesized changes, rather than on the likeliest short-term innovations.