The FBI may decide to leave a suspected mole undisturbed for years in order to feed him false critical information at an opportune moment or to use h… - Newton Lee

We cannot change the past even if we could go back in time. The fabric of space-time continuum may automatically correct anomalies caused by, say, a time traveler such that any ripple effects are short-lived.

Whatever fortune or misfortune awaits in the subsequent reincarnations, a purgatory by definition does not last forever. We will be forced to either go backward to the Amish way of life devoid of technology or move forward to a transhumanist world embracing technology.

Everyone is using science and technology to enhance or to alter our body chemistry in order to stay healthy and be more in control of our lives. We are all transhumanists to varying degrees.