Fresh off the decision to litter eastern Ukraine with toxic depleted uranium rounds, the Biden administration has just okayed another godawful idea we’re told is meant to benefit ordinary Ukrainians: the supply and use of cluster munitions in the country’s eastern regions.

There’s a reason why 123 countries — including 70 percent of Washington’s NATO allies and aspiring member state Sweden — have signed on to a convention banning cluster munitions, and why even US laws effectively ban the US government from providing or producing them: they are dreadful, mangling things that kill and maim children and other innocents for decades and decades after the fighting has ended.

Cluster munitions are one of those inventions so diabolical, it makes you have second thoughts about whether the development of human intelligence was really a good idea: a shell that splits midair into hundreds and even thousands of smaller explosives that fan out across an area as large as several football fields to explode upon landing — and whose high dud rate ensures that if they don’t kill or disfigure anyone when they’re first fired, they’ll do so years later when someone happens to be unlucky enough to stumble across them.