A convincing way to reason inverse square law (of classical EM and gravity) is a conservation of the field lines as one proceeds away from a source... http://hyperphysics.phy-astr.gsu.edu/HBASE/forces/isq.html It appears as a reasonable and intuitive thing to expect... but, it does NOT seem to hold for weak forces. So, how to convince ourselves of this violation in weak interactions, in a classical sense? (I know it comes about 'naturally' in QFT, but I want a classical/intuitive reason). As for the strong nuclear force, can we say the reason it does NOT obey inverse square law has got to do with the mass of the gluons and the strong gluon-gluon interaction? As in, can these negate any expectation of a conservation of (classical) 'field lines'? PS: If I have not made myself clear, let me know... I will rephrase.