Global began with a simple shape. Latin globus meant a ball or a round mass — soldiers formed themselves into a globus, a tight spherical formation. French borrowed it as globe, and English adopted the noun in the sixteenth century, quickly applying it to the Earth itself once navigators had confirmed its roundness. The adjective 'global' appeared around 1670, meaning 'spherical.' For two centuries it remained a technical, geometric term. The shift to 'pertaining to the entire world' began in the nineteenth century as trade routes, telegraph cables, and imperial ambitions made worldwide thinking routine. But the real explosion came in the twentieth century. 'Global war' entered common usage with the two world conflicts. 'Global economy' followed in the postwar decades. Marshall McLuhan coined 'global village' in 1962, capturing the compression of distance by electronic media. By century's end, 'global' had acquired yet another meaning — 'total, comprehensive' — used in computing ('global search'), medicine ('global assessment'), and everyday speech. Few adjectives have expanded their scope so dramatically, from describing a shape to describing everything.