A lot of assumptions in this model but an interesting read.
https://www.msn.com/en-us/news/technology/4-hostile-alien-civilizations-may-lurk-in-the-milky-way-a-new-study-suggests/ar-AAXVS4e?ocid=msedgdhp&li=BBnb7Kz&fbclid=IwAR2BZUBUsWhhoqPdDgiXI8v_6HgnCdiish_GIFuYyq1raNLaY9aKG6zF_MI