Short answer: Most evangelical Christians identify King David as the most likely author of Psalm 14 (and thus the verse Psalm 14:1), because the Hebrew superscription of the psalm explicitly attributes it to David and conservative evangelical practice generally regards those superscriptions as reliable.

Key points an evangelical Christian would emphasize

– What the Bible itself says: The Masoretic text and almost all English translations carry the superscription “Of David” (or “A Psalm of David”) at the head of Psalm 14. Evangelicals normally accept these headings as part of the inspired witness and therefore as authoritative evidence of Davidic authorship.

– Who David was: David was Israel’s shepherd‑boy, poet, musician and king (anointed by Samuel). He is traditionally the principal psalmist (many psalms bear his name), so attributing Psalm 14 to him fits the larger biblical picture of his literary role.

– Thematic fit: Psalm 14 deals with human depravity (“The fool says in his heart, ‘There is no God’”), corruption, God’s scrutiny of the wicked, and the hope of deliverance for Israel. Evangelicals see these themes as consistent with what might be expected from a Davidic psalm—moral observation, lament over sin, and trust in God’s saving action.

– New Testament use: Paul quotes and echoes wording from this psalm (and its close parallel, Psalm 53) in Romans 3 to argue for the universality of human sinfulness (“None is righteous… none does good”). Evangelicals point to that New Testament use as confirmation that the psalm’s teaching is canonical and applicable to the gospel’s doctrinal claims.

– On critical alternatives: Some critical scholars argue for different origins, dates, or anonymous composition, and note the close parallel between Psalm 14 and Psalm 53. Evangelicals typically recognize that there are scholarly debates about dating and editorial history, but they tend to uphold the biblical superscription as trustworthy unless there is strong internal evidence to the contrary.

– Practical application (evangelical emphasis): Psalm 14 is used to teach the reality of human sin, the folly of denying God, the need for repentance and faith, and the hope of God’s deliverance—pointing ultimately to Christ as the fulfiller of God’s saving purposes.

If you want, I can give a short biography of David, show the Hebrew superscription text and a few conservative commentaries that defend Davidic authorship, or summarize how Romans 3 uses this psalm. Which would you prefer?