by scholars such as Manfred Nowak and Malcolm Evans, distinguishes torture from other forms of cruel, inhuman, or degrading treatment by considering only the torturer's purpose, and not the severity. Other definitions, such as that in the Inter-American Convention to Prevent and Punish Torture, focus on the torturer's aim "to obliterate the personality of the victim". History Pre-abolition In most ancient, medieval, and early modern societies, torture was legally and morally acceptable. There is archaeological evidence of torture in Early Neolithic Europe, about 7,000 years ago. Torture is commonly mentioned in historical sources on Assyria and Achaemenid Persia. Societies used torture both as part of the judicial process and as punishment, although some historians make a distinction between torture and painful punishments. Historically, torture was seen as a reliable way to elicit the truth, a suitable punishment, and deterrence against future offenses. When torture was legally regulated, there were restrictions on the allowable methods; common methods in Europe included the rack and strappado. In most societies, citizens could be judicially tortured only under exceptional circumstances and for a serious crime such as treason, often only when some evidence already existed. In contrast, non-citizens such as foreigners and slaves were commonly tortured. Torture was rare in early medieval Europe but became more common between 1200 and 1400. Because medieval judges used an exceptionally high standard of proof, they would sometimes authorize torture when circumstantial evidence tied a person to a capital crime, if there were fewer than the two eyewitnesses required to convict someone in the absence of a confession. Torture was still a labor-intensive process reserved for the most serious crimes; most torture victims were men accused of murder, treason, or theft. Medieval ecclesiastical courts and the Inquisition used torture under the same procedural rules as secular courts. The Ottoman Empire and Qajar Iran used torture in cases where circumstantial evidence tied someone to a crime, although Islamic law has traditionally considered evidence obtained under torture to be inadmissible. Abolition and continued use During the seventeenth century, torture remained legal in Europe, but its practice declined. Torture was already of marginal importance to European criminal justice systems by its formal abolition in the 18th and early 19th centuries. Theories for why torture was abolished include the rise of Enlightenment ideas about the value of the human person, the lowering of the standard of proof in criminal cases, popular views that