I was a mercenary. Trust me: Erik Prince’s plan is garbage.

For the past year, Erik Prince has been peddling an idea that should alarm anyone who has followed his career: We should replace U.S. troops in Afghanistan with mercenaries, preferably his.

For those who do not know Prince, he was a founder of Blackwater International, the private military contractor that became so toxic, he had to change the company’s name. Under his management, Blackwater committed perhaps the worst war crime of the Iraq war: A squad of armed contractors killed 17 civilians at the Nisour traffic circle in Baghdad. The incident sparked a political uproar in Iraq, vastly complicated the mission of the State Department diplomats the contractors were ostensibly there to protect, and set off multiple probes into Blackwater’s conduct. A FBI inquiry later found that 14 of the 17 deaths were unjustified. For Americans, the “Nisour Incident” was a stain on their country’s moral character. For Iraqis, Blackwater’s reckless behavior and callous disregard for Iraqi lives seemed emblematic of America’s handling of the war as a whole, and helped to hasten our exit.

Now Prince wants to privatize the Afghanistan war. And Afghans thought the worst we could do was bomb them.