We disagree.

While we concede that the exercise of empathy is, in practice, often far too limited in scope, we dispute the idea that this shortcoming is inherent, a permanent flaw in the emotion itself. Inspired by a competing body of recent research, we believe that empathy is a choice that we make whether to extend ourselves to others. The “limits” to our empathy are merely apparent, and can change, sometimes drastically, depending on what we want to feel.

Two decades ago, the psychologist Daniel Batson and colleagues conducted a study that showed that if people expected their empathy to cost them significant money or time, they would avoid situations that they believed would trigger it. More recently, one of us, Daryl Cameron, along with the psychologist Keith Payne, conducted an experiment to see if similar motivational factors could explain why we seem more empathetic to single victims than to large numbers of them.

Participants in this study read about either one or eight child refugees from the Darfur region of Sudan. Half of the participants were led to expect that they would be asked to make a donation to the refugee or refugees, whereas the other half were not. When there was no financial cost involved in feeling empathy, people felt more empathy for the eight children than for the one child, reversing the usual bias. If insensitivity to mass suffering stemmed from an intrinsic limit to empathy, such financial factors shouldn’t have made a difference.

Likewise, in another recent study, the psychologists Karina Schumann, Jamil Zaki and Carol S. Dweck found that when people learned that empathy was a skill that could be improved — as opposed to a fixed personality trait — they engaged in more effort to experience empathy for racial groups other than their own. Empathy for people unlike us can be expanded, it seems, just by modifying our views about empathy.

Some kinds of people seem generally less likely to feel empathy for others — for instance, powerful people. An experiment conducted by one of us, Michael Inzlicht, along with the researchers Jeremy Hogeveen and Sukhvinder Obhi, found that even people temporarily assigned to high-power roles showed brain activity consistent with lower empathy.