Taken from the then-hugely successful rock musical Hair, this song was the 5th Dimension's biggest and most lasting record. The musical was already becoming a cultural phenomenon when the group saw it in 1968. Enraptured by the music, the band took the idea to producer Bones Howe, who constructed this mini-suite. The first section is a slick blend of soul and rock and is buttressed by lyrics with astrological references -- perfect for the time. The second section is a gospel meltdown, led by Billy Davis Jr.'s spontaneous in-the-studio vocal performance, which took the entire song over the goal line. It certain ways it may seem dated today, but the overall message of unity is, in the end, timeless.