What was an effect of the decline in trade after the fall of the roman empire?

What other considerations besides geographic ones did the allies have to take into account when choosing a site for the invasion?

Use the passage to answer the question. we hold these truths to be self-evident, that all men are created equal, that they are endowed by their creator with certain inalienable rights, that among these are life, liberty, and the pursuit of happiness . . –the declaration of independence which enlightenment thinker most directly influenced the notion expressed in this passage? thomas hobbes baron de montesquieu jacques bossuet john locke

Which factor has played the most important role in changing the way history is studied over time?