Explanation:
He was a (proto) archaeologist. Mastodon Mandible. ...
He was an architect. Detail of Jefferson's Floor Plan for Monticello. ...
He was a wine aficionado. Monticello's Wine Cellar. ...
He was a founding foodie. ...
He was obsessed with books.
The industrial revolution and the progressive Era. Also, the Spanish American war. <span />
<span>He united all the armies and generals into one Grand Army under his personal command, and he fought alongside his soldiers on the battlefield, inspiring almost fanatical loyalty</span>
B) save the Union
He wanted to preserve the Union at any/all costs