If something/anything is explained/broke down in a book and it's just a matter of learning about it all, there is nothing , NOTHING, I or most can't grasp within a reasonable amount of time. Yes there will be no...."I just can't figure it out"....that won't happen...if....you are interested and want to educate yourself.
As of right now, you have no clue at all about the origins of them old blues. You can't talk Mamie Smith who recorded the first blues record in 1920 with "Crazy Blues". You know nothing about those first great sprinters out of the Caribbean. You cant talk about the origins of pro football or the sci fi novel. Talk to me about the first pro boxers, rasslers? Yep...you can't. Thats because you don't care, you never took the time to educate yourself, well this is no different. Just a different set of facts, nothing more.