Nationalism affects globalization by fostering a sense of identity and loyalty toward one's nation, which can lead to tensions with international integration initiatives. While nationalism promotes the prioritization of national interests, it can also challenge global cooperation in areas such as trade, climate change, and immigration policy. Populist movements driven by nationalist sentiments may oppose policies perceived as compromising national sovereignty, leading to protectionism or withdrawal from international agreements. This dynamic complicates global governance, as nations balance the desire for global unity with the impulse to defend local interests and identities.