Why We Don´t Ways Act Rationally

After studying economics at the A level I wanted to understand that human behavior does not necessarily follow the logical prediction of the neoclassical model. I am confused about why this abnormality occurs, so I decided to read it further. Why do not people seem to always act reasonably? Banerjee and Duflo's "Poverty Economics" explained to me the reason behind many seemingly illogical decisions made by the poor.

Of these three viewpoints, I think Sidgwick is closest to the truth. According to a reasonable egoist it is unreasonable to take action in some way that we think is worse than other possible behaviors. It's not. Such behavior may be reasonable, for example, when we believe that this behavior makes fair things more accurate. For example, if this is the only way to save the lives of strangers, I can reasonably hurt myself. According to reasonable justice, we believe that it is not any reasonable behavior, and we believe that this behavior will be much better than other possible behaviors. It's not. This behavior may be reasonable, for example, when we believe that this behavior is better for ourselves. For example, rather than saving the lives of several strangers, we can reasonably save our lives.

It is only that you can not deduce the result. If we all act in these ways, we will take a wrong action. Also, everyone can not rationally assume that these actions mistakenly believe they are not wrong. Even if we have these false beliefs, we are only saying that many of us are not enough to act in these ways. There are several reasons why we and others wish that they do not have the wrong moral belief. And these are not situations where we have the opposite reasons.