Integrated essay: reading and lecture The reading and the lecture, both discusses about altriusm in animals and humans. The reading stands that there are many individuals who sacrifices for others without gain anything for themselves. However, the lecture claims that this individuals also benefit from their actions. Firstly, the reading states that a meerkat act as a sentinel to stand guard and protect it's group while they eat or hunt, so the sentinel will not eat or rest at all. On the other hand, the professor points out that in new researches the sentinels eat before stand guard, so they do not make sacrifices. Secondly, the reading stands that a sentinel puts on danger when it give the alarm of predators because it is the only who will scape alone after all the group. In contrast, the lecture claims that the sentinel is most likely to be the first of being safe, because it will scape at the moment it gives the alarm. Finally, the reading suggest that in humans, altruism is also demonstrate, when people donate organs while they are alive. How ever, the lecture states that this people deep inside look for appreciation of society. In conclusion, the speaker says that altruism in all species is not always a way of sacrifice, instead of that, they find benefits that will help them.