Insight by History

Democratic leaders invest in public goods because raising citizens' productivity expands the tax base, so even with lower tax rates the absolute resources available to reward supporters and fund government increase.

Large interconnected generators provide inertia because their spinning masses store kinetic energy that resists rapid frequency changes, which smooths spikes from faults or sudden load shifts.

More democratic systems tend to have lower average tax rates because broad citizen participation and many low- or non-taxpaying voters reduce average burdens, whereas autocrats can impose higher effective takes on productive citizens.

Some devices use grid frequency as a time reference, so frequency stability is critical because counting AC oscillations requires a consistent nominal frequency and deviations cause timing errors.

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.

Cities make wealth possible because urban concentration cuts transaction and transport frictions, boosts specialization, and accelerates knowledge spillovers, which together amplify productive activity and output.

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.