I have read through countless discussions, and have still to be convinced that gravity is weaker than the other fundemental forces, even though this is the accepted wisdom. My argument is that it is mass which dictates gravitational attraction, whereas charge, for example, is responsible for electrical attraction or repulsion. These are two independent qualities, and so surely no such comparison can be made. Two planets attract more strongly than two coulombs of opposite charge (of zero hypothetical mass) at the same separation. If the 'planet' was the SI unit of mass, would we say gravity is stronger? The fact that the gravitational attraction of two electrons is much weaker than their electrical repulsion is because they have insignificnt mass and significant charge. A singularity is theoretically just about the smallest entity known, yet it's gravitational pull is immense. In what sense, then, is gravity weak? Is it just that we live in a universe which has a greater charge density than it does mass density?