There were more identified serial killers in the 1970s and 1980s because a unique mix of social change, vulnerable victims, weak policing technology, and later media attention made those crimes easier to commit, harder to catch, and far more visible than before. Many experts now think it was a “perfect storm” era rather than something biologically unique about people born then.

The core reasons

  • More opportunity, less protection.
    • The post‑war boom and suburban growth meant lots of people traveling, hitchhiking, and living more anonymously, which created more “suitable targets” with fewer guardians around.
* Criminologists Cohen and Felson’s _routine activity_ theory argues that changes in daily life (more cars, more nightlife, more women working and going out alone) brought together motivated offenders, vulnerable victims, and weak protection more often.
  • Law enforcement gaps.
    • No DNA, no national databases, and poor coordination between local police departments meant killers could offend in multiple jurisdictions without anyone connecting the cases.
* Many police forces were simply not trained or resourced for behavioral profiling or complex pattern detection, giving serial offenders a big head start.

Why that era felt like a “wave”

  • Changing culture and social upheaval.
    • The children who became 70s–80s serial killers often grew up in the 1940s–50s amid wartime trauma, harsh parenting, family instability, and sometimes significant abuse—factors strongly linked to later violent offending.
* The 60s–70s brought loosening social norms, more people leaving home young, drug use, and a larger population of runaways and sex workers, groups that offenders often targeted because disappearances were less likely to be investigated quickly.
  • Victims who “fell through the cracks.”
    • Police and media historically prioritized “respectable” victims; missing sex workers, LGBTQ+ people, and runaway teens were frequently dismissed as voluntary disappearances, giving serial killers more time.
* These biases delayed pattern recognition and let some offenders operate for years before being detected.

Tech and policing: before and after

  • Why killers thrived then.
    • Before widespread DNA testing (late 1980s onward), investigators relied on eyewitnesses, fingerprints, and ballistics, which often were incomplete or easily avoided.
* No centralized databases for missing persons or linked homicides meant that murders in different cities rarely got connected unless a detective noticed by chance or the offender confessed.
  • Why we see fewer now.
    • DNA, integrated national crime databases, CCTV, phone/location data, and digital trails make it far harder to offend repeatedly without leaving a trace.
* Parents are less likely to let children roam unsupervised, hitchhiking has nearly disappeared, and it is harder to live “off the grid” or drift from job to job without documentation, all of which reduces opportunity for serial offending.

Media, myth, and “were there really more?”

  • Media made serial killers into a cultural phenomenon.
    • The rise of 24‑hour news, paperbacks, and later TV movies turned serial killers into recurring headline stories, creating a sense they were everywhere even when numbers were relatively small compared with overall violence.
* Famous cases like Ted Bundy, John Wayne Gacy, and the “Son of Sam” were heavily covered, feeding fear and reinforcing the idea that the 70s–80s were uniquely dangerous.
  • Better counting vs real increase.
    • Improved record‑keeping and the concept of “serial killer” itself became more formalized in the 70s–80s, so authorities began noticing patterns that earlier decades likely missed.
* Many researchers think there was both a real rise (due to social and opportunity factors) and a measurement effect, while today’s apparent decline partly reflects better prevention and faster detection.

Other debated theories

  • Environmental and health factors.
    • Some criminologists argue that childhood exposure to lead (from gasoline and paint) may have increased impulsive and violent behavior for a cohort that reached adulthood around the 60s–80s, potentially contributing to more serious violent crime, including serial offenses.
* Head injuries, especially to frontal brain regions, and severe childhood abuse are also commonly found in the histories of many serial offenders from that era.
  • Are serial killers “gone” or just different?
    • There are still serial killers today, but they are more likely to be caught earlier, and some operate online or in ways that do not fit the classic 70s “drifter killer” image.
* Some experts suggest that modern mass shootings, spree killings, and other forms of violence may have partially replaced the older pattern of long‑running serial murder, though this is still debated.

TL;DR: There seemed to be so many serial killers in the 70s and 80s because social changes created more exposed victims, policing tech was weak, inter‑agency coordination was poor, and media attention magnified the threat, all while a traumatized post‑war generation came of age in a high‑crime era.

Information gathered from public forums or data available on the internet and portrayed here.