So, which civilization invented tritium? Answer: the same one that invented all the other stuff that never should have existed.
https://en.wikipedia.org/wiki/Tritium#HistoryTritium was first detected in 1934 by Ernest Rutherford, Mark Oliphant, and Paul Harteck after bombarding deuterium with deuterons (a proton and neutron, comprising a deuterium nucleus). Deuterium is another isotope of hydrogen.[2][3] However, their experiment could not isolate tritium, which was later accomplished by Luis Alvarez and Robert Cornog, who also realized tritium's radioactivity.[4][5]
At this point, how can anyone still be on the fence about whether or not Western civilization needs to die?