What is the most peaceful song ever?

There are many songs that are considered to be peaceful, but one of the most well-known and widely recognised is "Weightless" by Marconi Union. It was scientifically designed to reduce anxiety and lower blood pressure and heart rate. According to research conducted by British neuroscientists, listening to this song reduces stress by up to 65%. It achieves this effect through combining slow tempo, steady rhythm, soft ambient sounds, and harmonic progressions designed to induce relaxation.