In the past, the kings applied the principle of Dharma to rule their people, settle a lawsuit for their people and kingdom at that time. There will be no severe punishments but instead they have misdemeanor by implanting the concept of Hell - Heaven to cause fear of misconducts and be aware of the consequences of committing an offense.
The application of Dharma by rulers in the past involved using the concept of Hell and Heaven to regulate behavior, settle disputes, and maintain social order. This approach was employed to instill fear and promote compliance with societal norms.