The former senator ran for president several times, but was best known as an anti-Vietnam war campaigner. Back in 1968, his anti-war campaign was so strong it helped persuade President Johnson against running for re-election.

He was 89 years old.

There goes a guy who fought for his beliefs.

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Eudaimonia

He played his part in history.

Was he the last of that group?

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Calm, quiet, smooth, devastating

As in the last of the '68 US presidential candidates? That may well be, I seem to recall that George McGovern made a last-minute bid to join the fray after the death of RFK, but he was not a significant player until 4 years later...

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Plug me into somethin'

If the theory does not conform to the facts, then the facts must be discarded.

No good deed ever goes unpunished

Never argue with an idiot. He'll drag you down to his level, & beat you with experience.