If you want to read an excellent book about collecting, I suggest reading "Brimfield Rush" by Bob Wyss. There is no sports to be mentioned in the book but it delves into why people collect. Having been going to Brimfield for many, many years, I was familiar with a lot of the people in the book and found it fascinating to hear their stories.
One thing I remember specifically from the book is that historians have found collections dating back to people living in caves! So, based on that, you would have to say it is part of our nature. However, my middle brother is a case why it might not be - my mom, dad, little brother and myself are all collectors - he collects nothing.
Link to the book:
http://www.commonwealtheditions.com/pro ... .cfm?PC=98