B. Obstructive karma

 In Theravāda Abhidhamma, karma is classified by function (kicca). Alongside productive and supportive karma, there is:

3️⃣ Obstructive Karma (Upapīḷaka Kamma)

Discussed in the Abhidhamma Pitaka and systematized in the Visuddhimagga by Buddhaghosa.

Definition

Obstructive karma does not generate rebirth and does not fully override other karma.

Instead, it weakens, disturbs, or interferes with the results of productive karma.

If productive karma is the seed, and supportive karma is fertilizer, then obstructive karma is:

• Poor soil
• Drought
• Pests

It reduces the strength or smooth unfolding of results.

🟢 Wholesome Obstructive Karma

Wholesome karma can obstruct the results of unwholesome karma.

It does not erase past bad karma, but it mitigates its intensity.

Examples

• A person with past violent karma is due for severe harm, but because of strong present compassion and generosity, the harm manifests in a milder form (e.g., minor injury instead of fatal accident).
• Someone previously prone to anger develops sustained loving-kindness meditation; as a result, hostile reactions from others decrease.
• Regular ethical conduct weakens the impact of earlier misconduct.

Function

It interrupts the full force of negative karmic results.

🔴 Unwholesome Obstructive Karma

Unwholesome karma can obstruct the results of wholesome karma.

It interferes with favorable conditions generated by good past karma.

Examples

• A person is born into favorable circumstances (due to wholesome productive karma) but persistent greed or anger damages relationships and opportunities.
• Someone has strong meditation potential but indulges in dishonesty or cruelty, weakening their spiritual progress.
• A person with good health repeatedly abuses the body, obstructing the benefit of prior wholesome karma.

Function

It limits, delays, or distorts positive karmic results.

⚖️ Key Distinction

Type	What It Does
Productive	Produces rebirth and life conditions
Supportive	Strengthens existing results
Obstructive	Weakens existing results
Destructive	Completely overrides weaker karma

🧠 Important Clarification

Obstructive karma:

• Does not cancel past karma.
• Does not produce rebirth by itself.
• Modifies the intensity or smoothness of results.

Karma in this model is not mechanical fate. It’s an interacting system of tendencies, where present actions influence how past actions ripen.

If you’d like, we can next examine destructive karma (upaghātaka kamma) — the strongest functional type — or how this model relates to psychological conditioning in daily life.