bostonglobe.com – First, Brexit came out of nowhere to change the world as we know it. Now, as Alex Gibney reveals in his new documentary “Zero Days,” opening July 8, we have “Stuxnet” and its progeny to worry about.

That’s the name of the virus cooked up by US and Israeli agencies that was employed in 2010 to sabotage the Iranian nuclear program. Though arguably a blow against nuclear proliferation, this undercover operation ironically could ignite a new arms race — of cyber weapons.

Recently we met with Gibney in a Harvard Square restaurant, where the prolific director of nearly three dozen films, including 2007’s Oscar-winning “Taxi to the Dark Side,” discussed his latest documentary and why he felt compelled to make it.