我们有义务付出直到受伤吗?肯怀疑我们是否有义务提供那么多。为什么有些人对我们来说比陌生人更重要，比如我们的孩子?有些人应该更重要吗?肯介绍普林斯顿大学教授彼得·辛格。辛格首先给出了一些为什么我们应该给穷人更多的理由。肯和约翰请辛格提供更多关于全球生活方式质量的细节。

Why should we give to poverty stricken countries? Singer tries to convince Ken to give more. Why should we forgo luxuries in our lives to give money to the poor? Singer replies that we shouldn't be indifferent to suffering just because we can't see it. How much cost to those near and dear should one bear to help strangers on the other side of the world? Why should those distant people matter as much as one's family? Singer replies that, if we abstract from our individual position and universalize the viewpoint, then we'll feel motivated to help.

Overcrowding is a problem. Wouldn't it get worse if people in the third world lived longer? Singer answers that as people become more educated and more affluent, they reproduce less, so it would not be as much of a problem as you would think. The discussion has been framed in terms of individual responsibilities. Should governments be required to give aid to poor countries? Governments exist for the people that created them, so why should a government do anything to aid people that are not its citizens? A lot of countries are messed up because their own governments messed them up. Singer replies that a lot of those people didn't elect the leaders that messed up their countries.

• Roving Philosophical Report(Seek to 04:14): Amy Standen interviews an economist about economic equality and mobility.

• Sixty Second Philosopher(Seek to 49:38):伊恩·肖尔斯(Ian Shoales)简要介绍了贫困的历史，从狩猎采集者到马克思，再到当代经济学和社会学。