Since taking over Afghanistan, the Taliban have said they will stop production of opium. But for the hawala system to work, Afghanistan must ultimately find sources of hard currency to lubricate the lines of credit that would snake back into the country. With exports in 2019 of about $870 million — mostly carpets, plus figs, licorice and other agricultural products — Afghanistan has little to offer on a large scale that is as lucrative as opium.

The Taliban could see support from governments like Pakistan, Iran and China that might have their own reasons for keeping relations with Afghanistan warm. Trade has already started up again with Iran, said David Mansfield, an independent consultant and an expert on rural Afghanistan, citing satellite imagery of fuel tankers and transit trucks moving across the border. He has estimated that during its insurgency, the Taliban was able to raise more than $100 million a year from informally taxing goods from Iran and southern Afghanistan.

Even if the Taliban raised several multiples more than that, it would mean a return to the minimalist state like the 1990s.