What extent did the idea of the enlightenment influence the politics of eighteenthcetury erope

I don't think it is possible to overstate how significant those ideas were.

That was the time in which the absolutist governments of Europe began to fall, being replaced with Constitutional Monarchies or other representative governments. This led to upheaval in much of Europe as the "old guard" of nations faced revolutions or wars with nations (like France) that wanted to change their own political orders as well.

that would be the steamboat because none of the other things are forms of transportation

the installment plan of the 1920s, an arrangement that allowed people to buy what they wanted with a small down payment and pay off the rest in monthly installments, provided americans a way to own what they did not have the money to buy.