For #3 at least, an environment that separated within-topic from between-topic competition for attention might be a major improvement. A large search engine co

For #3 at least, an environment that separated within-topic from between-topic competition for attention might be a major improvement. A large search engine cooperating with a government might be able to pull this off by making content also findable on any major all-vs.-all feed ineligible for display: a preselected topic is embedded in each search, so search results can in principle be isolated from between-topic attention competition. This would almost have to start outside the US, but if it actually works it may then see wider adoption. (I'd expect some radicalization/"evaporative cooling" memetic hazard to remain, but it should at least decrease in intensity, since one driver of increased self-radicalization is low viability of moderate, non-attention-grabbing content relative to overstated clickbait.)