I really agree with the speaker's point that the study of history is valuable only when it is relevent to people's daily lives. In my point of view, it is the history reserchers' mission to find regular in historical events that can help us to determin what is the best decision to make and whether people have done right or not.To evaluate a study, we often consider how it benefit our life. As physics and chemistry can bring us  powerful energy and enduring materials, biology can bring us strong body and konwledge about  organisms, the most valuable part of the history is that can help us to have a better life. People cannot imagine a life without  those things. When we try something that we have not ever tried, we always want to konw how it have been done in the past. If there are no historical records to refer to, we will spend more time in trying to do that, and we may have several failures. Moreover, when dealing with some contemprary phenomenons, we always compare them with the similar phenomenons that had emerged in the history. For example, to evaluate the damage of leakage accident of Fukushima nuclear power plant, we most likely to compare it with the similar Chernobyl catastrophe in 1986, which have caused huge effect that there are still so much radioactive substance. When specialists said what was happend in Chernobyl is far more serious than what is happend in Fukushima, people will know that it is not too bad and to be reassuring.