I can't believe what I'm reading here--sounds like a Hollywood script. Step out of the "everyone knows" box and put on your thinking caps. Ignacio is the only one who makes any sense.
Let's see...on the one hand you're all living the paleo lifestyle I'm assuming for health and longevity, and on the other hand paleo man was typically dead by 30 from an infection? We have a magnificently designed body with an amazing immune system. But the slightest infection would have killed us? Does that make sense? Then what's the purpose of an immune system? Yes, later in agricultural times when we were eating foods we hadn't adapted to, our immune systems became compromised and the increase in population and poor sanitation led to common infection. And, of course, today with the horrible diet infections are rampant--yes, people would be dying of infections. But in paleo times, with sparse population and eating the way we were designed, our immune system would have protected us.
Wars and the aggressive behavior, as Ignacio correctly stated, were also a result of population density and eating grains. No reason to be fighting in paleo times. And eating meat kept the neurotransmitters functioning properly. We all see the aggressive nature of vegans.
Famine? Again a function population density of agricultural times.
Regarding arguments I always hear of succumbing to accidents or being eaten by animals, sure, transplant any of us back into that time and I'm sure it would happen. But I would have to think that the average prehistoric would have heightened awareness of his environment such that those occurrences would not be commonplace. Let's see...on one hand our superior brain would enable us to outsmart an animal to catch it, but on the other hand we're so dumb as to be dinner for another animal.
If we had been so susceptible to all the things people claim, we would never have survived as a species.
Answering the specific question, I prefer living today because I like the modern conveniences. But I've no doubt that had we been alive then, my wife and I would have invited Ignacio and his family over for dinner, and we would have all lived a happy life to a ripe old age.