Infamously referred to as The Unabomber; he orchestrated a mailbomb advertising campaign against colleges and airliners for twenty years. He was a mathematics genius and kept a professorship on the College or university of California before learning to be a misanthropic recluse. The FBI called the situation for the acronyms UN(inversity) and Air travel BOM(bing), which can be how Kaczynski got his nickname. He was ultimately subjected by his estranged sibling. For a while he was imprisoned in the same device as the Oklahoma Town bomber, Timothy McVeigh, and both spoke; Kaczynski was unimpressed by younger bomber.