Doctrine of Double Effect

“Using harm as a means and foreseeing it as a side effect may carry different moral weight.”

01 / PLAINLY

What it means, plainly

This doctrine distinguishes using harm as a means from foreseeing it as an unwanted side effect of another action.

02 / CONTEXT

A little more

The doctrine of double effect tries to explain when foreseen but unintended harm may be permissible while pursuing a good end. Formulations add conditions about means, intention, and proportionality.

03 / WHY IT MATTERS

Why it matters

It forces attention onto the full causal plan, because “I did not intend it” does not by itself explain the harm's role.

04 / EXAMPLE

A familiar example

Giving pain relief while foreseeing a secondary risk is analyzed differently from using that risk as the instrument of death.

05 / LIMIT

What it does not mean

Saying “I did not intend it” is insufficient; the plan, alternatives, and role of harm all matter.

06 / NOTICE

Notice it in your day

Draw four boxes for a decision: goal, means, foreseen effects, and alternatives. Mark where harm appears and whether the plan needs it to work.

FINAL NOTE

The idea worth keeping

Map the causal chain and locate exactly where the harm sits in the plan.

QUESTIONS / 02

Questions people still have

What distinction does the doctrine of double effect try to capture?

It separates seeking or using harm from foreseeing it as a side effect of a different goal.

Is saying that harm was unintended enough?

No. The means, causal chain, alternatives, and proportionality also matter.