Complex sentence: This structure duplicates the in-group/out-group naming conventions used by many peoples, and reflects a period of traumatic conflict with outsiders during the 1st and early 2nd century rubber boom/oil exploration.
Split into simpler sentences: This structure duplicates the in-group/out-group naming conventions used by many peoples. It reflects a period of traumatic conflict with outsiders during the 1st and early 2nd century rubber boom/oil exploration.