Yes they often slowed work
In the early history of the U.S., some states allowed only white male adult property owners to vote, while others either did not specify race, or specifically protected the rights of men of any race to vote. Freed slaves could vote in four states. Women were largely prohibited from voting, as were men without property.
The one-child policy was generally
accepted to mean one birth per family,
meaning if women gave birth to two or
more children at the same time, they
would not be . Variopenalus reports in
Chinese and international media
suggested that this loophole led mothers
to take fertility to have multiple births.
Old history work contained mythology. Modern history work covers anything that happened at the last 220 years of human existence(after French revolution).