On blockchains, your identity isn&#x27;t just controlled by your key. It&#x27;s controlled by a <i>program</i>. That program can grant access to a particular key, but it can also encode a backup mechanism: as long as three of five of your closest friends vouch for you, you can add a new key.<p>Decentralization doesn&#x27;t mean no one&#x27;s in charge. It means you get to choose who&#x27;s in charge, and there&#x27;s zero barrier to replacing someone you put in charge.