 Electromagnetic radiation phenomena exhibit a temporal asymmetry: we observe radiation coherently diverging from a radiating source, such the light emitted by a star, but we do not observe radiation coherently converging into a source, unless we delicately set up such a system. What can explain this asymmetry? And how is the asymmetry related to the causal asymmetry, on the one hand, and the thermodynamic asymmetry, on the other? Debates on these questions have a long history. On one side we find both physicists and philosophers who maintain—in the case of physicists sometimes more, sometimes less explicitly—that the “arrow of radiation” is a manifestation of a causal asymmetry (Ritz 1908; Einstein 1909a; Jackson 1999; Griffiths 2017; Rohrlich 2006; Frisch 2005; 2006; 2014). On the other side, there are physicists and philosophers who maintain that the arrow of radiation has the same root as the thermodynamic arrow, an asymmetry between prevailing initial and final conditions (Einstein 1909b; Wheeler &amp; Feynman 1945; Price 1997; 2006; North 2003; Zeh 2007; Earman  2011).[5]