Physicalism grew out of materialism with the success of the physical sciences in explaining observed phenomena. The terms are often used interchangeably, although they are sometimes distinguished.
"If we're gonna "understand" each other, first we gotta make 'em suffer like we're sufferin'! Like when they stop a fight because someone got injured! But I know that'll never happen… that's why there'll always be war. It always rains here and I hate it. It's like this whole country is a big crybaby. I'm going to change it… and protect everyone!"