Final answer:
Natural law is believed to be inherent in human nature, but interpretations vary. Aquinas linked it to divine order, though critics argue human behavior is influenced by the environment and doesn't always reflect inherent morality. Evolutionary theory and societal influences further challenge the concept of a fixed moral natural order.
Step-by-step explanation:
Even though the natural law is written in our hearts and is natural to follow, it is still subject to interpretation and disputes among philosophers and theologians. Thomas Aquinas posited natural laws as part of a broader moral order established by a divine creator, suggesting that humans are morally obligated to use reason to discern natural laws and act in accordance with them. However, the interpretation of what constitutes natural law and how it relates to human behavior is not unanimously agreed upon.
Critics of Natural Law Theory point out that human behavior is complex and influenced by environmental factors, making it challenging to deduce moral principles from biological facts alone. The conversation around natural law also includes debates about whether moral behavior is innately tied to human nature or if it is shaped by societal norms and individual experiences. Furthermore, the influence of evolutionary theory and psychological perspectives offer alternative explanations for human behavior that do not necessarily align with traditional notions of a moral natural order.