Arc lights also enabled fascism in the early 20th century. A spectacle like the Cathedral of Light and the new technologies used by the Nazi party were transformative in terms of mass rallying:
The Manifesto of the Futurist Painters specifically cited cars and industrialization among its main inspirations, and both Mussolini and Hitler largely garnered public support from their opposition to Communism. Communism was profoundly a response to industrialization. Moreover, the kind of state regimentation that was central to authoritarianism of all kinds, including Fascism, would have been impossible without cars and impossible without industrialization.
Fascism without cars or industrialization would have had nothing in common with the Fascism we actually got.
One accessible example is that Federal power in the US really took off post-Civil War. Part of this story is that the war had greatly expanded the size and power of the Federal government, as well as weakening the old slaveocracy, but another is that centralized control of a territory as vast as the US basically requires telegraphs and railroads. Even if there were a political appetite for centralization in 1810s America, it just wasn't possible except where existing lines of communication were already adequate (coastal cities and those on major navigable waterways or canals).