Answer:
ambition
Explanation:
The "Great Expectations" is a famous novel by Charles Dickens, an English writer. The story of the novel centers on Philip Pirrip or "Pip." He was a loving orphan boy who became an ambitious man. He wanted to become a gentleman (a higher social status). Thus, along the way, he unintentionally hurt those whom he loved. In the end of the story, he realized the true value of having real friends and family. In this way, the story was able to provide guidance on how Pip's ambition turned out in the end and how it helped him.
On a similar note, Julius Caesar was also an ambitious person. He wanted power all to himself. This ambition of his led to his death when a group of senators conspired to kill him, thus leading to his downfall.
So, both of these stories center on the "theme of ambition."