Constantly smoothing things over actually lets conflicts pile up.
Tips
history
From 《后汉书·章帝纪》: 罪非殊死,且勿案验……冀以息事宁人 — Emperor Zhang of Han's edict asking officials to stop investigating minor offenses in hopes of calming matters and easing the people's lives.
usage
Often has a slightly negative edge in modern use — suggests conflict-avoidance that may gloss over real problems. When used positively, it praises a mediator's level-headedness.