Post Praetorian said:

If mankind were on the brink of discovering time travel, would it be better that the knowledge be shared universally or banned outright?

That would be dependent on what the expected effects of time travel would be. Would it be possible to alter the present, or would the present have already been affected by a past time travel? Or would it simply start a new timeline? Would it be possible for a time traveler to return to the same time he had come from, or would he be stuck in the alternate timeline he had created?