It seems like almost every non DeFi project, from DAOs to gaming and from airdrops to the support for public goods provided by Gitcoin and others, rely on some notion of identity in their decision making. And yet - all too often such systems are attacked by actors seeking to amplify their votes, game the games, farm the airdrops, and even divert public goods funding to their own projects. Such attacks that rely on the impersonation of thousands of seemingly independent identities that are actually orchestrated as one are called sybil attacks, and they are a growing threat across many sectors of web3. This is because fungible tokens can easily be divided across multiple wallets - a strategy that can enable one individual to divide into multiple virtual personas that each have some voting power. If the cost to create a new persona is lower than the reward that new persona can generate, users are incentivized to divide themselves. The ability to mount Sybil attacks undermines the one-person one-vote model that many projects would ideally implement.