Insight by History

Controlling the treasury is central to holding power because rulers must use state funds to reward key supporters, and without command of those funds they cannot sustain the coalition that enforces their rule.

Transmission voltages are stepped up at power plants because higher voltage carries the same power with lower current, which reduces resistive (I²R) losses over long lines.

Deliberately starving the countryside functions as political control because forcing people to focus on finding daily food robs them of the cognitive bandwidth and incentives needed to organize or question the regime.

Transformers can't work with DC because they require a changing current to produce changing magnetic flux; steady DC creates no changing flux and therefore induces no secondary voltage.

Potential supporters weigh expected survival and rewards before backing a coup because in stable democracies many already enjoy wealth and protections, and the risk of being purged after a seizure often outweighs uncertain gains.

Interconnecting the grid increases reliability because multiple networked transmission paths and generation sources let operators redirect power around failed equipment to avoid widespread blackouts.

In democracies, politicians reward voter blocs rather than individuals because winning requires mobilizing identifiable groups, so policies and subsidies are tailored to deliver group-specific benefits that secure votes.

Government agencies protect their institutional interests because departments derive jobs, funding, and authority from administering specific laws, so they resist data or policies that would shrink those programs and the careers tied to them.