Quora Answer : What is the greatest song ever?
The best song ever written is this.
There are many different dimensions of song-writing. Some people care about lyrics. Some about whistleable melody. Some about dancing. Some about feel. Some about musical craft. Some about the emotional honesty and storytelling.
I Will Survive isn't the "best" in any of these dimensions. But it's the song that scores most consistently well across every one of them.
There are songs with better lyrics that are worse to dance to. Songs with better grooves have less beautiful and catchy tunes. Etc.
But nothing does EVERYTHING to such a consistently high standard as I Will Survive.