@Antanicus It's worth elaborating that the overwhelming majority of arable land on earth isn't even used to grow human food directly. Instead, it's used to grow animal feed, i.e. to produce meat, which is an *incredibly* inefficient way to utilize that land.
Even if we only used parts of all that land to produce human food directly, distribute it fairly, and re-naturalize the rest, we could still easily increase global food production by multiple 100%s with much less overall harm to the planet.