Smiling more will make you happy

One concept that I liked to read but wasn't talked about yet was the lesson, "Cause in populations". Through "Cause in populations" the lesson describes how, "there's a higher probability the the effect will follow than if there were not the cause." Thus, when trying to state a cause of an effect concerning large numbers of people, it becomes forced to generalize normal conditions if specific statistical data is not present. For example, the text used an example where some people might say that "Smoking causes lung cancer." Chances are that smoking one cigarette isn't going to cause cancer or even 20, but because the statement concerns a large group of people, through normal conditions, smoking would eventually lead to obtaining cancer. Another example that comes to mind is that eating Mcdonalds everyday would probably cause you to gain unhealthy weight. Because of the large amount of saturated fat, oils, and sugars found in the majority of Mcdonald's fast food, eating Mcdonalds everyday would essentially make you gain unhealthy weight. Thus, this statement would apply to everyone under normal conditions and becomes a "Cause in populations" to obesity.