To answer what kind of man would decide that Almighty God required him to strike the institution of slavery with iron and lead, we must look past the wild-eyed icon of Harpers Ferry. In Tony Horwitz's framing, John Brown was not born a guerrilla commander; he was forged over decades in what Horwitz calls a school of adversity. He was a man defined by strict Calvinist faith, a radical family upbringing, devastating personal grief, and an almost relentless series of material failures. Brown was born in 1800 in Torrington, Connecticut, and raised largely in Ohio's Western Reserve, a region settled by New Englanders who carried intense Puritan values and moral fervor into the frontier. His father, Owen Brown, was a devout tanner and an outspoken abolitionist who taught his children that human bondage was a direct offense against God. From his earliest years, John absorbed both his father's leather-tanning trade and a strict moral framework that governed every choice. For example, Horwitz recounts a pivotal childhood anecdote that Brown later described as permanently scarring his conscience. While traveling as a young boy in Ohio, Brown witnessed the brutal beating of a Black slave child his own age. That single, terrifying moment horrified him, instilling a visceral hatred of slavery that never left him. To young John, that Black boy was an equal human being under God, and the cruelty of that beating convinced Brown that slavery was a monstrous sin demanding active resistance rather than quiet disapproval. As Brown grew into adulthood, his antislavery commitment was bound tightly to his Calvinist worldview. In Horwitz's analysis, Brown did not view personal hardship as a sign of divine disfavor. Instead, he understood suffering as a necessary crucible meant to test and temper chosen individuals for a higher purpose. And Brown certainly endured testing. Throughout the 1820s, 1830s, and 1840s, his economic life was a continuous catalog of disaster. He attempted business after business—tanning, land speculation, cattle dealing, sheep farming, and wool trading—across Ohio, Pennsylvania, Massachusetts, and Virginia. Nearly every enterprise collapsed under debt or poor economic timing. The Panic of 1837 devastated his finances, and in 1842, Brown was forced to declare bankruptcy, losing virtually everything. Lawsuits from creditors followed him across multiple states for years. His personal life brought even deeper grief. Brown fathered twenty children across two marriages, but nine of those children died in infancy or early childhood. Such crushing financial collapse and personal tragedy would have broken most men, driving them toward caution or quiet pragmatism. But as Horwitz argues, Brown processed his pain through an Old Testament theological lens. He saw adversity as God's method for preparing righteous servants, much like the biblical patriarchs who endured trials before fulfilling their divine callings. Now, the key idea here is not that Horwitz excuses Brown's later violence or presents his suffering as a simple justification for bloodshed. Rather, Horwitz shows how this psychology turned ruin into radical certainty. Because Brown had already lost his fortune, his credit, and many of his children, standard worldly risk calculations simply no longer applied to him. He came to see himself not as a failed businessman, but as an instrument of divine providence, being prepared by God for a monumental purpose. Once his faith and suffering convinced him of that calling, the next crucial step was determining how his antislavery conviction would move from spiritual obligation into practical, armed resistance.