If there was a TV show about the 1970s, what should its theme song be ?

Imagine a weekly TV series where every episode featured a different
story that took place during the 1970s . Some episodes would be about
famous people and based on situations that really happened . Other
episodes would be about ordinary people living their lives . It would
be primarily a drama, unlike "That 70's Show" . NOW --- If there was
such a TV show, what should its theme song be ? I only have three
rules --- My first rule is that this theme song has to be a leftover
from the 1970s . My second rule is that it has to be somehow
reminiscent of the 1970s . Some examples would be "Crackerbox Palace",
"Fly Like an Eagle", "Moonshadow" or "A Horse With No Name" . My
third rule is that you can't be lazy and nominate MY ideas . What are
YOUR ideas ? Thank you in advance for your answers .