What is the significance of nonpolar molecules having only London dispersion forces (LDFs) as their intermolecular forces?

Nonpolar molecules rely solely on London dispersion forces (LDFs) for their intermolecular interactions. This is significant because LDFs are the weakest type of intermolecular force, resulting in lower boiling and melting points for nonpolar substances compared to polar molecules with stronger intermolecular forces like hydrogen bonding or dipole-dipole interactions.