Calvinism is a biblically serious theological system — TULIP is grounded in specific texts (Romans 9, Ephesians 1, John 6, John 10). Arminianism is equally serious with its own strong texts. Both are held by serious Christians. This is a disputable matter — not a salvation issue. 72/100 Spiritually Safe.
TULIP is the acrostic summary of the five points of Calvinism developed at the Synod of Dort (1618-1619) in response to Arminianism:
T — Total Depravity: Sin affects every dimension of human nature — humans cannot seek God without divine grace (Romans 3:10-12, Ephesians 2:1-3). The least disputed point.
U — Unconditional Election: God chose those he would save based on sovereign will alone, not foreseen faith (Ephesians 1:4-5, Romans 9:11-13). Most controversial — Arminians hold election is conditional on foreseen faith.
L — Limited Atonement: Christ's death specifically secured salvation for the elect. Most debated within Reformed theology — many four-point Calvinists reject L.
I — Irresistible Grace: God's saving grace effectively accomplishes its purpose — those God has elected will come to saving faith (John 6:37).
P — Perseverance of the Saints: The genuinely saved will persevere to the end (Romans 8:38-39, John 10:28-29).
Arminianism (Jacobus Arminius, refined by John Wesley) holds: grace is universal and prevenient, election is conditional on foreseen faith, the atonement is unlimited, grace is resistible, and believers can fall from saving grace. Strong texts: 2 Peter 3:9 ("not wanting anyone to perish"), John 3:16, 1 Timothy 2:4.
Both systems have strong biblical texts. Romans 9 is powerfully Calvinist; 2 Peter 3:9 is powerfully Arminian. Neither system fully resolves every tension in Scripture — which may itself be evidence that the truth is deeper than either human theological system captures. This is a disputable matter where serious Christians can disagree. See our Theology hub and our guide on Is Once Saved Always Saved Biblical? The Gospel Coalition on Calvinism and GotQuestions on Calvinism provide thorough treatment.
For the foundational concept of grace in the Bible, see our guide What Does Grace Mean in the Bible?
For the doctrine at the heart of the Reformation, see our guide What Is Justification by Faith?
For the deeper dive on predestination specifically, see our guide What Is Predestination?