Absolutely! It all depends on what type of career you are talking about. I would say a 90 year old could start a new career and make 6 figures or more.
You see people in their late teens and early 20's making millions or billions with the right skills and ideas. I don't see why it would be different for someone older than that. What someone older might lack in physical strength, they can more than make up for in experience and wisdom.
I think the older you get the more chances you have to apply all the wisdom and skill you learned during your life. Unless a person gets old and crusty and set in their ways anything over 55 really should be the "Golden Years". More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.