There was a time when those figures would have been on Page 1, or in some sci-fi horror story about the Soylent Green world of an ominous future. Well, that future is here. How far the species has come. The sacrifice is now a matter of individual choice. A million and a half individual choices a year.
Nobody needs to strap anybody to an altar.
For it has gone on long before the Aztecs, this impulse to sacrifice to the latest god. The name of the god might have changed. But the result remains much the same, only on a much more impressive scale. It's all accepted now. The trick is not to notice.