Demographics alone probably explain this well enough in the US. Tech workers skew heavily young and skew heavily college educated. If you sample any population with those demographics - in this political environment - you're going to get some pretty anti-trump sentiments. Although maybe not necessarily "leftist"<p>Personally, I think Twitter (or any social media) gives the impression that this group is more radical than they probably are as a whole.
This isn't going to be a productive discussion - OP has not defined any of the key terms, and should at least do some work first. At least write a short essay to elaborate on the questions you're interested in, and what your current thoughts are.
I don't think this topic is going to lead to a very HN-rules-and-norms-respecting discussion. :-(<p>One thing that I was wondering about related to this, which might be a slightly more concrete question and easier to talk about:<p>In 1996 Paulina Borsook wrote an essay which she later expanded into her 2000 book <i>Cyberselfish</i>, in which she argued that Silicon Valley was super-libertarian in a way that she strongly disliked.<p>There are still people on the left who feel that Silicon Valley as a whole is disagreeably indifferent to income inequality and class issues. (This is sort of like Thomas Frank's complaints: you worry about culture war topics, but you should worry about income inequality instead.) But I doubt many of them would see Silicon Valley as libertarian in anything like the way that Borsook experienced it. Nor do libertarians or conservatives, many of whom say it's now become uncomfortable or risky for their careers to express their views in Silicon Valley.<p>How did we get from a 2000 Silicon Valley in which someone is writing a book like Borsook's to now?<p>Edit: actually, an even more famous example of roughly the same idea is Barbrook (as opposed to Borsook) on "The Californian Ideology"<p><a href="https://en.wikipedia.org/wiki/The_Californian_Ideology" rel="nofollow">https://en.wikipedia.org/wiki/The_Californian_Ideology</a><p>which is from 1995.
> Why is leftism the dominant ideology at most big tech companies?<p>It's not.<p>Big wage-labor-dependent investor-owned companies and leftism aren't particularly compatible.<p>Non-economic-class identity politics, a bourgeois distraction from leftism, are popular at many big tech companies, because they provide a veneer of progressivie image without seriously challenging, and in fact deflecting the most serious challenges to, the capitalist economic order.<p>Now, from the perspective of the far right this looks kinda like leftism since it's somewhere off to the left of the far right, and US political dialogue is shaped by the far right doing a very good job of shaping the media by working the refs over a period of decades.
The main reason goes well beyond tech companies, to all large organizations. In the workplace, leftists are more discriminatory regarding political ideology. People on the right are often willing to hire and promote people on the left, but that graciousness is not reciprocated. Leftists fire Trump supporters. Over time, this leads to complete control.<p>There are minor reasons too. One is that many tech workers are young people fresh from university indoctrination, but without children and mortgages. Another is that many tech workers come from outside the USA. Besides that fact that many non-USA places are more leftist, there is a selection bias caused by the fact that these people are not dedicated to staying in their own countries; they are fundamentally more globalist than the people that they leave behind.
The legions of open source advocates are necessarily socialists (at least with respect to information sharing in general and software specifically).<p>Socialism is central to modern software development. If it was not then there would be no "free software foundation", "no open source", no plethora of "copy-left" licencing. I don't say this as if it is a bad thing. Clearly we are centuries of person years ahead software wise as a result of this socialism.<p>This individual behavior stands in stark contrast to the behavior of most tech companies as a whole that are clearly not "leftist". There is nothing leftist about NDA agreements, confiscation of IP and anti-poaching agreements to control wages. There is nothing leftist about dark ui patterns, shifting terms of service and harvesting of personal information and micro-transactions.
It's worth nothing that such leftism is usually accompanied by an enormous hypocrisy.<p>Many people will complain about working conditions of people with lower skill level, most of them are not going to quit over that and renounce the fat faang-style paycheck.<p>Same for massive surveillance, pervasive tracking, and unionisation and many more topics.<p>Anecdotally: I've seen a few people turning their eyes the other way as soon as Amazon or Google started dropping monthly cash bombs on them.<p>So the question could actually be: what is the <i>actually</i> predominant ideology in big tech companies?