In a world already teetering on the edge of geopolitical volatility, Israel's recent military strike on Iranian territory and killing key figures marks a troubling escalation, not only of regional tensions but of the continued erosion of the international legal order.
Far from being a defensive necessity, the attack stands as a blatant violation of the foundational principles of the United Nations Charter and a troubling affront to the rules-based international system.
Unlawful use of force: No justification under the UN charter
According to available reports, Israel launched a targeted strike inside Iran, citing alleged Iranian threats as justification. While the specifics remain contested, the implications for international law are clear and urgent: This was not a defensive response to an imminent armed attack; it was a unilateral use of force across sovereign borders, carried out without UN Security Council authorization and absent of the procedural safeguards mandated by international law.
The UN Charter -- signed in 1945 as the cornerstone of the modern international order -- could not be more explicit. Article 2(4) prohibits the threat or use of force against the territorial integrity or political independence of any state. The only exceptions are Security Council authorization under Chapter VII or self-defense in response to an armed attack, as set out in Article 51.
Israel, however, has offered no credible evidence of an imminent attack by Iran that would justify a pre-emptive strike under international law. Even if Iran’s rhetoric or activities in the region raised legitimate security concerns, the principles of necessity and proportionality -- central to the doctrine of self-defense -- are wholly absent in this case.
A state cannot invoke self-defense based on speculative or preventive logic; such a precedent would unravel decades of legal restraint and embolden other states to act as vigilantes on the international stage.
A dangerous pattern of impunity
This is not the first time Israel has flouted international legal norms in the name of national security. From the 1981 bombing of Iraq's Osirak nuclear reactor to recent airstrikes in Syria and Lebanon, Israel has demonstrated a persistent pattern of bypassing multilateral mechanisms in favour of unilateral force.
Each time, the world debates but rarely holds the state accountable -- sending a message that might continue to override right, provided the right allies are in your corner.
Chief among those allies is the United States, whose steadfast diplomatic cover and military support have emboldened Israel’s extraterritorial actions.
Washington’s silence -- or worse, implicit approval -- after the strike on Iran only reinforces a troubling double standard in the enforcement of international law.
The result is a geopolitical environment in which legality is subordinate to power and strategic interest.
The dangers of such conduct extend far beyond the Middle East. If powerful states continue to act with impunity, disregarding the Charter’s core prohibitions, weaker states will eventually lose faith in the international system's ability to protect their sovereignty.
The erosion of legal norms governing the use of force risks setting us back to a pre-Charter world -- a world where wars of choice, aggression, and reprisal become acceptable instruments of statecraft.
Restoring the authority of international law
The United Nations, for its part, must do more than issue carefully worded statements. The Security Council, despite its paralysis due to geopolitical alignments, should not remain silent.
Even in the face of veto politics, the General Assembly and international legal institutions must step in to affirm the rule of law.
Iran, if it chooses, has the right to seek recourse through the International Court of Justice (ICJ), and the global community must be willing to support legal remedies over retaliatory violence.
This moment is a test -- not only for those directly involved but for all who claim to believe in international law, diplomacy, and the principles of sovereign equality.
Upholding the Charter's prohibitions is not an act of idealism; it is a pragmatic necessity to prevent the descent into perpetual conflict.
We cannot allow legal exceptions to become the new norm. If we do, we forfeit the fragile order that generations have painstakingly built from the ashes of World War II.
The international community must speak clearly and act decisively: Israel’s attack on Iran was unlawful. And silence, in this case, is complicity.
Md Mustafizur Rahman is a former Ambassador and Permanent Representative of Bangladesh to the UN Offices in Geneva.