If time travel was ever possible, then why hasn't someone from the future come back to visit us?

@Slumberjack:

I agree. You explained it well and I agree. However, how about 'Love thy neighbor'. Is that not a truism rooted in the soul of humanity? "Do not unto others that which you wouldn't want done to you'. 'Lay not up your treasures where rust and dust doth corrupt'.

Although I am not a theologist I am quite confident in assuming all religions have versions of the same. Surely these truisms are deeper than a power structure control mechanism.

More than likely, the 'love thy neighbor' truism pre-existed before being incorporated into the superstitious mechanisms of control as they developed. Putting 'soul' aside for a minute, 'love thy neighbor' can be seen as an adaptation for survival among hunter gatherer and early communal living societies. Even without an encompassing understanding of theology vs. anthropology, I believe its logical to imagine that loving the notion of belonging to a clan or a community, caring for those who inhabit ones surroundings in an era which contained a range of known and unknown dangers outside of ones immediate field of vision, combined with great ignorance and fear about the way the world and nature itself came into being, is entirely consistent with the development of 'love for one another,' beyond individual maternal/paternal instincts that are common to every living thing. Many superstitions that were handed down out of the earliest known societies included things that were already well developed, understood and practiced, all without the need of having them demonstrated for our benefit by a divinity. The religious ruling classes simply made into edicts and laws what ordinary people understood all along as common sense behavioral patterns which were vital for their own collective well being and survival. If only those classes had practiced what they preached throughout history. By and large, nothing has changed for them in 10,000 years. Judaism as expressed through Zionism, the Christian Religious Right, and factions within Islam are all evidence enough of the perpetual stasis.  But I'm afraid we've veered rather sharply now from the topic of this thread.

Even Dawkins describes himself as sitting somewhere around 9.9 on a scale of 10 supporting the non-existence of god.  The remaining .1 is left open for future scientific analysis should anything pop up.

He's made no such claim that I'm aware of, apparently preferring instead to contemplate evidentiary likelihoods.

But if someone were so intelligent as to invent such a device, and with approximately 13 billion known or estimated years of time in the universe to consider, perhaps they just haven't yet gotten around to our 50k blip of existence on the scale of things.  We'd have to be quite selfish about it to expect first dibs on a visitation.

And that's not even considering the evolution of some 'prime directive' governing time travel. If there were rogue time travelers going around interfering with things, what are the odds that even more advanced time travelers weren't going around behind them to tidy up the mess and put everything back in its place. Trekkies have been debating these concepts for years, and I think they had it pretty much nailed down in one particular Voyager episode.

Closed for length.