Prof Nutt made and published a universal harm scale which accounts for multi dimensional harm of drugs, and potentially allows comparisons to be made between them https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6109763/#B29. This work got him sacked from his lead advisory role to the UK govt, as it undermined the policy and caused embarrassment. Nutt still works in Imperial College researching psychedelics as novel therapeutics. The money shot is this https://www.researchgate.net/figure/Overall-weighted-scores-...

A recent article which contextualises the work is here https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6109763/