The 5 Stairsteps, billed as the "First Family of Soul", scored their biggest hit in 1970 with "O-o-h Child". A year later, the family band, with the name shortened to The Stairsteps, appeared on Soul Train during the series' 1st season. DiscoLarry124 uploaded this clip.
More recently, the song resurfaced on the charts, covered by gospel singers Kirk Franklin & Donnie McClurkin. The positive message in the song certainly resonates even today.