This episode's headline: Toward the Brink; How We Live and Now; Conversatin; Songs of Brazil; Idleness Praised. ANCHOR: JIM LEHRER; GUESTS: DAVID ALBRIGHT; LEONARD SPECTOR; CHRIS HEDGES; CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN