Frontiers and Borders
A frontier is a zone of fading authority, whereas a border is an exact line of sovereignty. Pre-modern authority faded with distance, creating zones where two empires claimed the same valley. The border arrived when states needed to tax, conscript, and administer uniformly.
| Type | Definition | Trouble |
|---|---|---|
| Antecedent | Drawn before dense settlement | Often the calmest |
| Subsequent | Evolved with settlement | Fits people; fits terrain poorly |
| Superimposed | Imposed over cultural landscape | Cuts through nations |
| Relict | Abandoned, but still visible | Persists in voting and rails |
Relict boundaries are invisible ghosts. The border between Prussian and Russian Poland disappeared in 1918, yet it still organizes behavior in Polish electoral maps because institutions outlive borders.
The Straight Line Problem
About 30% of African land borders are straight lines drawn by Europeans, partitioning ethnic groups 40% of the time. Yet post-independence states kept them because opening the question risked total chaos. A line drawn in ignorance becomes real through administration.
Over sixty years, arbitrary borders accumulate different currencies, schools, and legal systems. The map preceded the reality, and then produced it.
Geopolitics Warning
Mackinder's Heartland thesis (1904) stated that whoever controls the Eurasian interior controls the world. This is a classic geopolitical pitfall: presenting strategic arguments as iron laws of geography to justify policy and conquest in the language of inevitability.