Fab Times: an industry blog created and maintained by Schuette Metals.
Copper wires fused accidentally before a lecture over 100 years ago was the seed that grew resistance welding.
Welding with gas became the first step away from forge welding. However, it appeared just in time to help shipbuilders during World War One
The Greek Titan Prometheus brought fire to mankind, giving mankind heat, hot food, and Forge Welding to make the tools needed to survive.
It may seem like it's only been around for a 100 years, but Welding traces its lineage to the Iron Age