>>By watching the nightly news.
"I KNOW BUT ONE CODE OF MORALITY FOR MEN WHETHER ACTING SINGLY OR COLLECTIVELY"
--Thomas Jefferson
History inevitably measures the impact of behavior upon social and biological
fitness; as presumably the group with higher fitness is the one with more viable offspring over multiple generations... and is also the group that gets to write history.
To write history, or to revise it...
"Those who control the past control the past control the future... those who control the present control the past"
--George Orwell
"you will know the Truth and it will make you free"
Are we there yet?