The correct answer to this open question is the following.
You forgot to include your particular historical question, the tips, and the instructions. So although you forgot to include those elements, we can help to comment on the following.
To write a great thesis statement, you have to find one or two powerful statements that could represent the foundation of your work. You can write the main idea of your report. You can have your stand on the subject. Do not forget to be specific and concrete. Another piece of advice would be this. Your statement has to be somewhat controversial. This means that after reading it, your readers would have different opinions about it. If everybody agrees with your statement, it is probably wrong. A good thesis statement invites debate.
Answer: A great leader has great self-control and makes sound decisions.
Explanation:
Odysseus and his men reached the Island of the Cyclops as they sailed home and Odysseus out of curiosity decided to explore it further even through his men tried to convince him to return to the ships.
As a result, several of his men were killed and eaten. This went against Greek attitudes and values of a leader having self control and making sound decisions because Odysseus had no self control when he decided to stay on the island instead of making the sound decision to leave immediately.