Who’s to blame for big problems like racism, factory farming, or climate change? Isn’t it time we held governments and corporations accountable? Or would that just let individuals off the hook? This week we’re talking about collective responsibility.

Sometimes you will be faced with choices that are hard because of the great number of options there are, the difficulty of comparing them, or limitations on your information. They’re extra painful when stakes are high. It’s pretty amazing that such difficult decisions get made at all.

This week we're thinking about the Logic of Regret. Regret is a feeling of sadness, repentance, or disappointment over something that's happened or been done… especially a loss or missed opportunity. Seems normal enough -- so what’s the puzzle? Well, for starters, it seems irrational to regret the past.  You can’t change the past, so why waste time feeling sad about it?