First pages of, Alexander the Great Failure

Summary
The story begans with a very short summary of Alexander's father, Philip the second. Phillip was the first king to put Macedonia on the map. His achievement was nearly unmacthed, his empire spread into other Greek city-states. King Philip was an influence for the next generation, he left in his wake an accomplishment that was hard to compete with. His son Alexander would not only compete with it, but surpass it to such an extant his name is recalled to this day. But his empire was doomed to fall as it slowly grew.

Quotation
"...the downfall of his empire was doomed from the start as he could never be statisfied with what he had..." John Grainger 3.
Th quotation is important because that one sentence will be the main idea of the book; the unstatisfacory feelings of Alexander, the mistakes he made because of his greed, and what he paid because of his actions.

Questions
King Philips empire isnt thoroughly explained, why is that?
What happens after the death of Alexander, besides the fact the empire breaks down?
What became of Alexanders' family members before, during, and after his empire existed?