Why did ancient egypt develop into a powerful civilization

What two things are being compared in this epic simile (the odysseus)

How would lincoln's assassination change the direction of reconstruction? the radicals used this opportunity to take control of the plans. the south refused to cooperate with any plans after lincoln his death would put an end to all reconstruction plans. lincoln was too weak to carry out his plan and now it could be carried out.

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?