So I actually have a Social Studies book from my old school, lucky for you, we got to the Cold War.
Here's what the book stated:
One of Reagan's proposals was the Strategic Defense Initiative (SDI). He believed this defense shield could make nuclear war impossible, but the unlikelihood that the technology could ever work led opponents to dub SDI "Star Wars."
Also, I do know that this is also found on another website but thats probably where the book's information came from.
The most likely reason for women to become heads of state is the general progress in gender equality, which slowly introduced women to position of moderate power (parliament), which prepared ground for their position as a head of state.
Primary sources are a example of first hand reports or eyewitness account
