Large numbers of small homogenous groups. "I am a member of the Short Red tribe"
The society is reestablishing collapsed social structures and rediscovering lost knowledge. Ex: High Middle Ages, post-WWII Europe
Cars, airplanes, radio, ocean liners, submarines, battleships, tanks, machine-guns, fighter aircraft, fission bomb, flak jacket, hydroelectric power, alternating current electricity, major surgery, antibiotics
World War I / II (TL 6)
Dating, marriages, nookie, and all that mushy stuff
Marginalized characters in a society of alienation
Psionics are an outgrowth of the processes of life, and variables such as species, emotions and states of consciousness can affect psychic powers.
All people are psychic, though only a few are powerful enough to use it consciously or to great effect. Psychics may seem strange to most people, and high-powered attacks may affect bystanders.
Technology to boost or mimic psionics is available.