The dismal science it is not called for nothing.  Why dismal?  Because it has math involved.  You can not understand economics if you don't understand math.  And you can not understand economics if you don't have a rudimentary understanding of time, money, goods, sales and a slew of other things. 

The words we use to describe economy today were, believe it or not, mostly invented by Karl Marx.  Before him there was really too much written about economics.  Adam Smith described economics in a fundamental math sense, and oddly, even Socialists have to follow his precepts.  They deny this of course.  Indeed, you couldn't find barely a person who would believe that the explanation of producing a widget was applicable to Socialism as it is to Capitalism.  The reality though is that there is only one underlying mathematics for all the people on the globe when it comes to economics.  

What everyone is really arguing about is who gets to
Control the economics everyone must deal with.  The idea that there are different economic systems is false.  There is only one economic system.  What there are is different systems of controlling the economics.