How Far Might the Culture of Death Take Us?

How far might the culture of death take America? Could our government someday limit the number of children a family is allowed to have? The Chinese government has already done so.
Will assisted suicide and euthanasia be taken further?  Might we, sometime in the future, have mandatory life limits? Will only those without physical, mental, or emotional problems be allowed to live? Could "retirement at age 65" take on a whole new, evil meaning? Will the only choice be how one dies?
Right now, of course, this is only speculation. I pray that it never becomes fact, for if it does, then the second sentence in the Declaration of Independence will need to be revised and edited to read:
"We hold these truths to be self-evident, that all men are created equal, that they {have} certain Rights, that among these are Liberty and the pursuit of Happiness."