Dead. But seriously "living history" is a vague term. We are all living history right now or another phrase is "in living memory" making the time line stretch back 70-80 years or so. A person who existed before this was just a person of their own time.
That was almost certainly before recorded history even existed.
Ancient Man - jewellery existed long before written records.
pi is a universal constant which existed long before the first human existed. It existed even before the solar system came into being so there is no person who invented it and so no biography.
It is unknown, as the first persons to create beer existed before written history began. The earliest records of beer production have been traced to the early Egyptian period.
No, toys had been around for hundreds of years before Cleopatra existed.
Memorials are generally monuments made to a person or persons who have passed away. Public history is the history of a group of people, not a specific person or group of people. Living heritage is what is going on right now.
That cannot be known as bipolar disorder has existed through all recorded human history and therefor must have occurred in prehistoric times. It almost certainly existed as long as modern humans have existed and may even have existed in some of our pre-human ancestors.
No.
A person who creates something totally new is considered an inventor. He or she creates something that has never existed.
No, that concept existed centuries before the French Revolution.
it was discovered before written history
Probably someone before recorded history