So far, it hasn’t, primarily because access to the means of destruction has been limited and deterred.
Several mechanisms work towards self-destruction. Most are irrational, while some are predictable.
1. Some people want to die but do not want to die alone. For example, in rare cases, pilots have crashed airplanes full of passengers to commit murder-suicide. This is highly irrational.
2. Some people are driven by hate. They hate other people, and they hate themselves. They want to cause as much destruction as possible. This is also irrational.
3. Many people are acutely aware of their perceived low sexual market value. They may react as listed in points 1 and 2. But they may also become self-sacrificing martyrs for certain causes, hoping to posthumously become idols. If they were still alive, they believe this status would grant them very high sexual market value within their peer groups.
4. Others who struggle with their perceived low sexual market value may aim solely for the destruction of others, expecting that after widespread destruction, they will have a comparatively higher status. In their minds, they perceive this as a calculated move.
All of these tendencies are not new. They have just failed to cause widespread annihilation because access to such technologies was historically restricted to state actors subject to deterrence, rather than being technologically insufficient.
That access, however, may change.