Final answer:
In state-level societies, people generally work harder due to population growth, social stratification, militaristic threats, and regional trade opportunities.
Step-by-step explanation:
In state-level societies, people generally work harder than those in bands, tribes, and chiefdoms. This is due to several factors. Firstly, population growth and increasing social stratification create a need for more productivity and labor. Secondly, the militaristic threats from neighboring societies and the opportunities for regional trade require societies to mobilize their workforce and engage in economic activities.