Here’s a list of some of those theories (as I interpret them), explained in extremely concise terms as best as I could manage:

The List of Thinkers and Their Core Ideas:

1. Peter Singer

We would ruin expensive shoes to save a drowning child we walked by, but not forgo expensive shoes to save one far away. We say it’s wrong to torture animals, yet our factory farms constantly torture them to make the meat/eggs we choose to buy. We should do more good.

2. Nick Bostrom

Technology is often good, but not always, and sometimes it is incredibly dangerous (e.g., nuclear weapons, engineering of viruses). If we invent enough technologies, eventually we may invent one that totally devastates civilization, even if actors are well-intentioned.

3. Eliezer Yudkowsky

Each year, AI gets more powerful. It’s on course to eventually be smarter than the smartest human in almost all ways. But these AIs are alien minds that won’t embody what we care about sufficiently well. When that happens, it will likely go extremely badly for humanity. Nobody knows how to make such a system safe.

4. Robin Hanson

Many of the explanations for why we do things don’t make sense (if we did X for claimed reason Y, we’d also do Z, which we don’t do). The most parsimonious explanation is that much of our behavior is just social signaling, which we engage in without even realizing it.

5. Elon Musk

If we let climate change or A.I. get out of control before we get off this planet, we’re F’d. Let’s get off this planet before it’s too late.

6. Jonathan Haidt

We often think we use our reason to arrive at moral conclusions, but mainly we use our reason to try to rationalize or justify what our moral intuition tells us. Political parties/groups have differing moral intuitions, and there are good people on all sides.

7. Noam Chomsky

We view the U.S. as a democracy, yet large corporations and a small group of elites have far more sway over what happens than anyone else. We view the U.S. as a world benefactor, yet its actions abroad are self-serving.

8. Andrew Yang

Automation is eventually going to take away a massive number of jobs (with e.g., self-driving cars and trucks, automated checkout, and AI assistants). We need to figure out how to make society work for all as jobs disappear and wealth becomes even more unequally distributed.

Of course, I had to vastly oversimplify your views to fit them in this format – hopefully I did so about as accurately as the format allows.

This piece was first written on August 26, 2020, and first appeared on my website on May 18, 2026.