For thousands of years, Western society has insisted that it is better for 10 guilty defendants to go free than for one innocent defendant to be wrongly convicted. This daunting standard finds its roots in the biblical story of Abraham's argument with God about the sinners of Sodom.
Abraham admonishes God for planning to sweep away the innocent along with the guilty and asks Him whether it would be right to condemn the sinners of Sodom if there were 10 or more righteous people among them. God agrees and reassures Abraham that he would spare the city if there were 10 righteous. From this compelling account, the legal standard has emerged.