i'm suppose to write an essay on the historical climate of a author i pick and it was lewis carroll, and i don't know what it means or where to get that info on it or what to write about it. please help!

Historical climate is a description of the history of the time in which he lived. How his time affected his writing.

These site should help you with that.
http://www.victorianweb.org/authors/carroll/carrollov.html

http://en.wikipedia.org/wiki/Lewis_Carroll
http://www.lewiscarroll-site.com/