Victor Davis Hanson of National Review Online looks back at great American achievements unlikely to be replicated today.

We of the 21st century are beginning to look back at our own lost epic times and wonder about these now-nameless giants who left behind monuments that we cannot replicate, but instead merely use or even mock.

Does anyone believe that contemporary Americans could build another transcontinental railroad in six years?

Californians tried to build a high-speed rail line. But after more than a decade of government incompetence, lawsuits, cost overruns, and constant bureaucratic squabbling, they have all but given up. The result is a half-built overpass over the skyline of Fresno — and not yet a foot of track laid.

Who were those giants of the 1960s responsible for building our interstate highway system?

California’s roads now are mostly the same as we inherited them, although the state population has tripled. We have added little to our freeway network, either because we forgot how to build good roads or would prefer to spend the money on redistributive entitlements.

When California had to replace a quarter section of the earthquake-damaged San Francisco Bay Bridge, it turned into a near-disaster, with eleven years of acrimony, fighting, cost overruns — and a commentary on our decline into Dark Ages primitivism. Yet 82 years ago, our ancestors built four times the length of our singe replacement span in less than four years. It took them just two years to design the entire Bay Bridge and award the contracts.

Our generation required five years just to plan to replace a single section. In inflation-adjusted dollars, we spent six times the money on one quarter of the length of the bridge and required 13 agencies to grant approval. In 1936, just one agency oversaw the entire bridge project.