He ordered barley because barley is used in producing beer and whisky and he wanted to drink alcohol because he liked it. He therefore changed one of the commandments from no animals shall drink to no animals shall drink to excess because it suits his needs. It's just one of the many commandments that he changed.
There are many reasons for the government to step in and create policy after policy during the Great Depression. The Great Depression was essentially caused by people buying things with money they didn't have, which in turn made the economy tank and made TONS of people poor and unable to purchase basic necessities. So the government created a the New Deal, which is essentially a ton of programs that allowed younger teenagers to work to help supplement the family, but also to build new infrastructure for roads, highways, dams, etc.. Without the new deal, and all of those policies we would've been unprepared for the upcoming World War 2
James Madison became known as "Father of the Constitution" for his contributions.
The 3 great empires were the Mughal, Ottoman, and the Safavid empire.