Most of the world’s power grids were built when energy was inexpensive, plentiful, and thought to be environmentally benign. That is no longer the case. Demand is expected to double by 2050 and the need for peak electricity is growing. Driven by population growth, bigger houses, bigger TVs, more air conditioners, and more computers, growth in peak demand for electricity has exceeded transmission growth by almost 25 percent every year since 1982 in the U.S alone. This is happening at a time when the grid must respond to new stresses it was never designed to handle - from electric vehicle fast chargers to intermittent renewable sources of energy to community energy storage. The world, its energy needs, and the sources and location of supply are rapidly changing.