President Donald Trump is taking a blowtorch to the rules that have governed world trade for decades. The “reciprocal’’ tariffs that he announced Thursday are likely to create chaos for global businesses and conflict with America’s allies and adversaries alike.

Trump calls it unfair that some countries apply higher tariffs to specific American goods than the U.S. applies back. A new executive order seeks to change that.

Including VAT s in reciprocity would lead to hefty increases in tariffs. Goldman Sachs, a bank, says that if America adopted only mirror-image tariffs without retaliation, its levies would rise by an average of two percentage points. Many European vat rates exceed 20%.