  The hierarchical structure formation paradigm predicts the formation of pairs
of supermassive black holes in merging galaxies. When both (or one) members of
the SMBH pair are unobscured AGNs, the system can be identified as a dual (or
offset) AGN. Quantifying the abundance of these AGN pairs as functions of
separation, redshift and host properties is crucial to understanding SMBH
formation and AGN fueling in the broad context of galaxy formation. The High
Latitude Wide Area Survey with Roman, with its unprecedented combination of
sensitivity, spatial resolution, area and NIR wavelength coverage, will
revolutionize the study of galactic-scale environments of SMBH pairs. This
white paper summarizes the science opportunities and technical requirements on
the discovery and characterization of SMBH pairs down to galactic scales (i.e.,
less than tens of kpc) over broad ranges of redshift (1<z<7) and luminosity
(Lbol>1E42 erg/s).
