Removing foreign ownership restrictions in the Philippines' constitution would strengthen national security in three key ways: 1) It would increase foreign direct investment, which would increase other countries' willingness to help the Philippines defend its territory against China. 2) It would allow modernization of strategic infrastructure like telecoms and ports through well-capitalized foreign investment, improving response capabilities. 3) It would enable the Philippines to join the Trans-Pacific Partnership and strengthen its relationship with the US, an important ally against Chinese territorial threats.