Deontological Ethics

Deontology

Deontological Ethics is essentialy duty based morality.

It keeps focus on Duty or Rule or Obligation to do an action, the right or wrong nature of the action is based on the rule set. The action should be done because that action is your moral duty, regardless of the outcome.

For example: 

Do not lie.Do not kill.Speak the truth.

Think of telling the truth because it is the right thing to do, regardless whether you get any benefit at the end, or any outcome in your favour.

"Its a Duty for duty's sake."

"Let justice be done though the heaven falls."

Deontology is derived from Greek word deon (duty) logy (science). The relationship between duty and morality of human action.

Categorical Imperative 

The most famous proponent was Immanuel Kant for this thought of duty based morality .He introduced the term categorical imperative, it, a mental yardstick to determine if a rule is valid or not. He suggested that before you act, you should ask yourself: 

"Would I want this action to become a universal law that everyone must follow?"

It's a rule of conduct that is unconditional or absolute for anyone, the validity of which doesn't depend on any desire. 

For example : Thou shalt not steal. 

Hypothetical imperative :

It is distinct from categorical one, and is associated with desires such as:

Don't steal if you want to b e popular. 

You don't have to calculate complex pro and con lists for every decision, you simply follow the moral law.

It prevents the majority from mistreating a minority just because it might benefit the larger group. 

Limitations :

It is rigid and inflexible.But life is messy and following a certain rule at a given specific time can sometimes leads to disastrous result. 

For example, you either break a traffic law or take the dying person to the hospital.

Deontology can struggle to provide an answer when two absolute rules collide, leaving the individual in a moral deadlock.