"The Planck length is the scale at which classical ideas about gravity and space-time cease to be valid, and quantum effects dominate. This is the ‘quantum of length’, the smallest measurement of length with any meaning." What I am wondering about this description is the word "dominate". Does this mean quantum effects are all there is at this level? Would Quantum Gravity be needed? Does this mean quantum effects "dominate" more at the the planck scale than they do, on say, the electron? Do quantum effects on the electron get downgraded to something like "significant"? So the planck length is where quantum effects are the strongest and they get a little weaker as we move up the scale from this starting point? Thanks.