Slavery was de-centralised evil on a massive scale. The genocide of the Native Americans was largely decentralised, as part of the &quot;cost&quot; of land acquisition. Global warming has  de-centralised causes.<p>Relying on people (government or corporations) to do the right thing won&#x27;t work. You need a system that cannot fail by design. Some checks and failsafes to guarantee the worst cannot happen at the government or individual level.<p>As an example you can look at studies tackling accounting fraud. Whether the accountant is managing thousands or billions of dollars doesn&#x27;t change his&#x2F;her odds of stealing from the company much. Adding a second accountant to sign off on large purchases and check each other does.