I really hope time is linear
Imagine that if time travel became a reality what some people might do with that new toy.
If I had a time machine, I would go back to the point before life started. Upon my arrival, there would be no hesitation on my part after a few photo ops (I just hope the flash works and lights the place up sufficiently). I would gather all the primordial soup, consume it (yum!), and not excrete it until I got back to the present day. I’d be giddy with the power I possessed to create such a messed up paradox.
No, I wouldn’t. It sounded pretty cool, though. Really, I would probably go back to 15th Century Italy and watch rivals Michelangelo and da Vinci in action. I might show my partiality towards the latter artist just to incense the other to make a fracas for entertainment purposes. I can’t fathom that doing any appreciable harm. There might be some collateral damage, but no big whoop. The toe of David was broken at one point, but can anyone tell? I think not.
Einstein just retooled his famous formula from the grave. E=MC2: Egomania equals Mass Destruction squared. I know I took license with that. Seriously though, how does ‘C’stand for velocity of light? Huh? Answer me, dammit! Besides, there was no good synonym for destruction that started with that letter (carnage didn’t flow off the tongue for me).