by pyrrhonic

I'm wondering if there is an effective method to follow a "thread" across different websites.

Exmple 1: this article

has drawn a bunch of interesting responses across the Web, including

Example 2: Since The Ecomodernist Manifesto was released, environmentalists of all stripes have been compelled to respond to it.

To me, the entire purpose of the Web is to be able to have people from all backgrounds discuss important matters like these. The promise of the Web was to be able to link all of these voices together. Two decades on that promise is largely unfulfilled. There are pingbacks, of course. But those are only used on a few platforms. They also have to be implemented by the OP. Usually when I find responses it's because I'm subscribed the right feeds, because I hunted them down, or sheer luck. Does anyone know of an effective way to index these kinds of threads?