Complex sentence: In his book, "Human Ecology", Hawley wrote that humans will modify their behavior patterns to fit with the changes in the biophysical environment and through this adaption human groups can either evolve or expand into complex societies.
Split into simpler sentences: In his book, "Human Ecology", Hawley wrote that humans will modify their behavior patterns to fit with changes in their biophysical environment. Through this adaption human groups can either evolve or expand into complex societies.