Final answer:
The belief that the strongest societies will survive is rooted in the concept of laissez-faire economics. It argues that economic markets should operate without government intervention.
Step-by-step explanation:
The belief that the strongest societies will survive is rooted in the concept of laissez-faire economics. Laissez-faire economics argues that economic markets should operate without government intervention. It was a prevailing belief in the 1800s and early 1900s, but eventually, the government had to step in to regulate monopolies and trusts in order to maintain fair competition and protect the interests of the society.