Spaces between sentences: one or two?

Why I Two-Space, by Steve Losh, is the best argument in favour of two spaces.

One Space Between Sentences, by Matthew Butterick, is the best argument against it.

I always use only one space, but interestingly I think Steve, by far the underdog here, makes the better of the two arguments.

Found on Twitter: Four examples offered by Fritz Swanson of spacing after periods from early printed works.

Further examples, both for and against extra spacing:

Joel (Author) ·