I don't think I can come up with 5.
1. Both have a system of voting to decide major issues like whether or not to go to war. The difference is in who can vote. Mostly it was an issue of property in Athens. You had to own property to be able to vote. Foreigners and women were not given the vote.
2. It was a citizen's duty to debate the issues in Athens. America, when I was growing up, had a similar stance. I believe it is more repressive now.
3. The vote, once completed, was what was done. That idea in America ended with Gore vs Bush over the Florida election. And now all that can be debated is Trump. I'm not fond of the man, but I also don't like the fact that people are "at war" about whether or not he should stay in office. The cry is for impeachment, especially from some democrats. There is little hint of cooperation in that. Before all this, though once elected, a president (with the exception of Nixon) could look forward to a modicum of cooperation.
That's about what I can come up with.
As with everything, interpretations depend upon the reader. An example can be the Quakers who were religious and fought for abolition of slavery claiming that the constitution stated itself that all people on Earth are equal since they were created by God, the creator. The founding fathers, however, believed that slaves cannot be people and that they are 3/5 of a regular human being, so equality does not apply to them.
Answer: Basicaly if the pres dies then the vice goes next
Explanation: Look at what I attached
They were scared of how rapidly it was spreading. It had taken control of some strong powers which the Americans feared could lead to a war. It lead to the cold war which isn't a physical war but it was a very frightening. Both sides had control over hundreds of nuclear warheads, so yea, we peed our pants. All it took was a simple remark to mark the end of humanity. It went a little like this;
Communist: Say I wont press the button.
Us: You wont.
Coms: WHAT??? *Reaches for button*
US: NO I WAS JOKING! WE WILL DO WHATEVER YOU WANT!
Coms: Keep talking...
And that pretty much what happened. The communist were strong back then, who knows what there capable of in the future.
Hope I helped. :)