Thomas Jefferson and Alexander Hamilton Thomas Jefferson bought Louisiana because he believed every family needed a large, self-sufficient farm. Alexander Hamilton gave birth to the Bank of the United States because he thought our nation needed capital investment. Jefferson used his ideology to extend agrarianism. Hamilton used his to build economic power. Where would we be if we removed the Hamiltonian developments from America and substitute for them the Jeffersonian values? Perhaps on farms, extending agrarianism. We�d be supplying food to Europe so that they could have the factories turning out the luxuries of the world