What legal idea is contained in this edict from Hammurabi’s Code?

The Hammurabi code of laws, a collection of 282 rules, established ... which ruled in central Mesopotamia (present-day Iraq) from c. ... The edicts range from family law to professional contracts and ... In his written dialogues he conveyed and expanded on the ideas and techniques of his teacher Socrates

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.