。
Democracy actively affirms freedom.
Literal
Democracy [topic-は] freedom [object-を] actively recognizes.
積極的に ('positively, actively') is an adverb formed from the な-adjective 積極的, commonly paired with verbs of endorsement or action to stress commitment. 認める has a broader range than its usual 'recognize' — here closer to 'affirm' or 'endorse.'