Oops. Misread 'earlier' as 'later'. In that case, have the Napoleonic Wars engender a great deal more fear of destructive power involving newer technologies like rocketry, steam-powered ships, and similar military technologies. Make the Luddites and similar groups more successful, combine them with Marxist elements in democratic countries and disincentivize industrial development outside of peripheral or non-European countries (Mysore, Japan, China, maybe a different Republic of Texas, etc). Embolden the Counter-Reformation and reinforce the Second Great Awakening or even make room for a Third Great Awakening with further effect. Make the Crimean War and 1848 rebellions even more deadly to reinforce the effect, especially if there is no gain to be had at the end of either.
Continue with a Franco-Prussian War and then a World War I with technology more akin to the 1870s or early 1880s. Make it such a killing field that by war's end, especially if the 1918 Flu pandemic hits, it is viewed by the religious as punishment for sin and the Luddites as punishment for irresponsible technological development. Have them win power in most of the Western democracies, have their ideologies infect the Soviet brand of Communism. Make technological innovation reviled publically if discovered and against the law with stiff punishments. If successful enough some 'recent' technologies are likely lost and by 2020 we may see a blend of OTL 19th century tech at various levels, probably railroads and semi-automatic weapons, but no computers, telephones, or perhaps even mass-produced steel.