Oldest person alive today wasn't born until well after Lincoln died. The oldest animal alive is over 200 years old and the oldest living organism is several thousand years old. Not sure what you mean by "living being" but I don't see all the organisms that are thousands of years old suddenly dying all at once nor all the animals over 200 years old dying all at once and the oldest person alive today couldn't have met him, so what do you see changing in the next 20 years?