Jesus. Literally.

Surface tension is the the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.

Hydrogen bonds in water are responsible for the high surface tension. At the surface, there are fewer water molecules to cling to since there is air above. This results in a stronger bond between those molecules that actually do come in contact with one another, and a layer of strongly bonded water.

Water particles at the atomic level help keep the cell membrane from collapsing on itself.

Without surface tension, even the smallest objects would sink underwater. The large particles of dust would not float on the water, but instead the particles would sink to the bottom and kill all of the marine life.

Birds rely on surface tension to increase the volume of water displaced by their bodies and float more easily. Due to surface tension, water can not penetrate between the feathers and fluff. Thus, the volume displaced by the bird is much larger than the volume of his body, which facilitates fluctuation.

The high surface tension of water is also essential for processes such as water and blood transport in plants and animals respectively. The concave motion of the surface of the water allows it to be "pulled up" by plants from the ground.

The concave motion of the surface of the water allows it to be "pulled up" by plants from the ground.

Small animals would not be able to walk on the surface of water, which would cause the marine life to lose their food source, corrupting and collapsing the ecosystem.

Water is a critical component in cytoplasm, this means that the surface tension of water allows the cytoplasm to hold-up the cell membrane. If the pressure is too extreme, then the water breaks down the cell membrane and the cell "drowns", ending all existence and leading to mass extinction.

THE BIBLE

http://water.usgs.gov/edu/surface-tension.html

https://socratic.org/questions/why-is-surface-tension-important-to-life-on-earth

https://en.wikipedia.org/wiki/Surface_tension

http://physics.about.com/od/physicsexperiments/a/surfacetension.htm

http://sergiorbtorres.blogspot.com/2014/07/the-ecological-importance-of-surface.html