Alex Jones has claimed for some time that estrogens/testosterone inhibitors have been dumped in US drinking water for some time.
It’s called work, or lack thereof. Physical labor increases testosterone. Twiddling one’s thumbs on a phone or keyboard can’t replace squats and deadlifts. Men once regularly performed these motions as part of their work and increased muscle mass and testosterone in equal measure. Once society collapses, the need for real work will naturally increase t-levels.