The declaration of independence refers to rights as being unalienable. what does “unalienable” mean?

In believe unalienable means cannot be surrendered
This means that the rights that mentioned in the declaration of independence already exist ever since everyone of us were born cannot be overlooked by any government officials no matter how high his/her position might be..

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.