Differential technological development

Differential technological development is a strategy of technology governance aiming to decrease risks from emerging technologies by influencing the sequence in which they are developed. On this strategy, societies would strive to delay the development of harmful technologies and their applications, while accelerating the development of beneficial technologies, especially those that offer protection against the harmful ones. 
History of the idea.
Differential technological development was initially proposed by philosopher Nick Bostrom in 2002 and he applied the idea to the governance of artificial intelligence in his 2014 book . The strategy was also endorsed by philosopher Toby Ord in his 2020 book , who writes that "While it may be too difficult to prevent the development of a risky technology, we may be able to reduce existential risk by speeding up the development of protective technologies relative to dangerous ones."
Informal discussion.
Paul Christiano believes that while accelerating technological progress appears to be one of the best ways to improve human welfare in the next few decades, a faster rate of growth cannot be equally important for the far future because growth must eventually saturate due to physical limits. Hence, from the perspective of the far future, differential technological development appears more crucial.
Inspired by Bostrom's proposal, Luke Muehlhauser and Anna Salamon suggested a more general project of "differential intellectual progress", in which society advances its wisdom, philosophical sophistication, and understanding of risks faster than its technological power. Brian Tomasik has expanded on this notion.