Procrastination
The temporal scope of procrastination's existence defies precise measurement. Archaeological evidence suggests task-avoidance behaviours predated written language itself. The phenomenon has persisted continuously for a minimum of 10,000 years of documented human civilisation, likely extending far deeper into prehistory.
More remarkably, procrastination shows no signs of diminishment. Despite centuries of philosophical inquiry, psychological intervention, and productivity methodology, the behaviour remains as prevalent as ever. The digital age has, if anything, expanded its toolkit and accelerated its spread through infinite distraction mechanisms.
Thanos
Thanos possesses impressive individual longevity, having lived for over one thousand years according to established Marvel canon. His species, the Eternals of Titan, are blessed with extended lifespans that dwarf human existence. This millennium of accumulated experience contributes to his tactical sophistication and philosophical development.
However, as a fictional construct, Thanos's existence is bounded by copyright law, corporate strategy, and audience interest. He has existed in human consciousness only since his 1973 comic debut—a mere fifty years. His cultural relevance depends entirely upon continued media production and generational transmission of interest.