Thats bad translation man.......the man you translates the book you have has no idea of the political system on Greece at that time that why you are so confused.
And yes Alexander had the idea to unite all the know world at the time BUT how would do it if he did not unite all greeks under him.
And again if Macedonians did not seem them selfs as Greeks why the hell did they pick up Greece to unite and not join with the Persians in the first wars and fought against them with all Greeks???
Man this translation hurts Historical Facts to your head with the wrong speed.







