In the last 47 years, there's voluminous data, with many millions of pregnancies,each a data point. So we can be very sure.
I doubt if you could find a historian who wouldn't consider a half-century to be enough for a history.
Roe vs. Wade was 1973, and there is history in some states before that. And of course data from other nations as well.
History is data and inference is what we learn from it.
A half-century seems like a lot of history to me, given the mass of data we have from those decades.
History is written by the winners, only much later do we second guess them.
History of the Gulf War
Since the Arab oil embargo of 1974, Western states have attempted to find alternatives to their growing dependence on imported oil. However, the West did a better job of negotiating regional security arrangements to protect the leading sources of oil imports than it did in finding substitutes. With the fall of the Shah of Iran and the Iranian hostage situation, the West lost its only regional military base. This loss caused an increased risk that the Gulf could be dominated by a radical anti-Western power (Cordessman 1-2). When Iraq invaded Kuwait, the West moved quickly and decisively to strike down the enemy that would threaten its allies and deprive it of its supply of oil.
https://www.freeonlineresearchpapers.com/history-gulf-war
Historians would be puzzled by your assertion.