As the percentage of Americans smoking has fallen to below 14 percent, and tobacco giant Philip Morris has even declared it is trying to “achieve a smoke-free world,” it’s tempting to think the public health debate over smoking, tobacco and nicotine is over.

It’s not.

Instead, the battle has largely shifted to a new debate over prohibition vs. mitigation: Should smoking, vaping etc. simply be banned? Or should governments treat products that lower risks of bad health outcomes differently than they treat traditional cigarettes?