One, if the US didn't embargo oil to Japan, would they have bombed Pearl Harbor?
Probably. We (Allies) embargoed all kinds of material they needed to continue their conquests. Oil was the final straw
America squeezed Japan by blocking its trade
Treasury Secretary Henry Morgenthau and Interior Secretary Harold Ickes vigorously endorsed this policy. Roosevelt hoped that such sanctions would goad the Japanese into making a rash mistake by launching a war against the United States, which would bring in Japan’s ally Germany.
Accordingly, the Roosevelt administration, while curtly dismissing Japanese diplomatic attempts to harmonize relations, imposed a series of increasingly stringent economic sanctions on Japan. In 1939 the United States terminated the
1911 commercial treaty with Japan.
George Morgenstern, in the book
Perpetual War for Perpetual Peace, noted Americas’ actions: “On July 2, 1940, Roosevelt signed the Export Control Act, authorizing the President to license or prohibit the export of essential defense materials.” Under this authority, “[o]n July 31, exports of aviation motor fuels and lubricants and No. 1 heavy melting iron and steel scrap were restricted.”
Next, in a move aimed at Japan, Roosevelt slapped an embargo, effective October 16, “on all exports of scrap iron and steel to destinations other than Britain and the nations of the Western Hemisphere.”
Finally, economic warfare escalated on July 26, 1941, when Roosevelt “froze Japanese assets in the United States, thus bringing commercial relations between the nations to an effective end. One week later Roosevelt embargoed the export of such grades of oil as still were in commercial flow to Japan.” The British and the Dutch followed suit, and embargoed exports to Japan from their colonies in southeast Asia.
Prior to the attack on Pearl Harbor, Roosevelt and his subordinates knew they were putting Japan in an untenable position through economic warfare.
studentsforliberty.org