Civilizations based on the irrational revelations of prophets have proven themselves to be more successful and appealing over a longer period of time than any rationalist society to date.

Depends what you mean by "based on" (and to a lesser extent "prophet" if you want to argue about North Korea, China and the old USSR). People seem to prefer, for example, America over Iran as a place to live.

As we speak, the vast majority of humans being born are not adopting, and never will adopt, a rational belief system in place of religion. Rationalists are quite literally a dying breed.

Hang on, that's a bit of a non-sequiter. Just because rationalists won't become a majority within the current generational cohort doesn't mean we're shrinking in number, or even in proportion. I haven't seen the statistics for other countries (where coercion and violence likely play some role in religious matters) but in Western nations non religious people have been increasing in number. In my own nation we're seeing the priesthood age and shrink (implying that the proportion of "religious" people committed enough to make it their career is falling) and in my city Adelaide, the "City of Churches", quite a few have been converted into shops and nightclubs.