Cannabis is legal for medicinal purposes in 29 states, with CBD (limited THC content) legal in 17. It's recreationally legal in 9 states, as well as DC. That leaves only four states with no approval.

In 2018, a number of states will be voting to legalize either recreational or medicinal marijuana. If trends continue, soon half the country will allow recreational and only a few (likely the same four as of now) will be against it completely, if that.

Canada (fellow G7 participant, and America's neighbor) will be legalizing it federally this year.

Will cannabis be removed from Schedule I of the Controlled Substance Act before 2024?

This question will resolve positively if, before January 1, 2024, marijuana has been officially classified as something other than a schedule I drug in the US.