Experiments are ideal for the study of complex phenomena. The best way to really understand a phenomena is to rebuild it. The best way to identify a causal relationship is to reconstruct it. By producing the cause, we can be sure that it is indeed the cause for a certain effect.
Of course, we are not conducting experiments for the sake of experiments. Our ultimate goal is to bring the results out of the laboratory into the world. The ultimate criterion for the usefulness of an experimental result is how it can help us to understand the world outside the lab and change it for the better. In this sense, experiments should be inspired by making an hypothesis outside the lab, and the results of experiments should be strived to be applied to the world outside the lab.
Social events occur randomly under complex circumstances. This intricacy renders it difficult to study human behavior. The experimentalists do not have to wait for things to happen in order to observe how people respond under certain conditions. They can conduct experiments and put people in to particular situations.
The constant failure of policies has shown us that it is imperative for us to better understand human nature.
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