Will there ever be time travel? No. How can I say that? One of the greatest achievements of the medicinal science wizardry of our time was surely the eradication of smallpox. Efforts to do the same with other diseases might prove equally successful over time. Yet the eradication would surely become a terrible failure if somewhere in the future humans could ever travel in time. Humans are inherently unruly and tell a wannabe time travelling human of the future to never use it to go into a time and place where there was smallpox and they might just do it just because they can. Intrepid humans spread smallpox around the world nearly wiping out a large percentage of it a few hundred years ago and the spread carries on until recent times when the vaccination against it was made to succeed by global concerted effort. All would be spoiled if a time traveller went to a time before its eradication and picked it up and carried to a time since its eradication still in our past. Clearly it has not happened which leads to only one conclusion which is that time travel will never be possible.