William Blackstone famously observed, “in order to have a crime, there must be a vicious will.”<ref>William Blackstone, Commentaries 21.</ref> However, in the modern regulatory state there are increasing attempts, particularly at the federal level, to create crimes that do not require proof of ''mens rea'' (often referred to as strict liability offences). | William Blackstone famously observed, “in order to have a crime, there must be a vicious will.”<ref>William Blackstone, Commentaries 21.</ref> However, in the modern regulatory state there are increasing attempts, particularly at the federal level, to create crimes that do not require proof of ''mens rea'' (often referred to as strict liability offences). |