1st Corinthians is the seventh book of the New Testament and the second book of the epistles.
The apostle Paul founded the church in Corinth. A few years after leaving the church, the apostle Paul heard some disturbing reports about the Corinthian church. They were full of pride and were excusing sexual immorality. Spiritual gifts were being used improperly, and there was rampant misunderstanding of key Christian doctrines. The apostle Paul wrote his first letter to the Corinthians in an attempt to restore the Corinthian church to its foundation—Jesus Christ.
Brief Summary: The Corinthian church was plagued by divisions. The believers in Corinth were dividing into groups loyal to certain spiritual leaders (1 Corinthians 1:12; 3:1-6). Paul exhorted the Corinthian believers to be united because of devotion to Christ (1 Corinthians 3:21-23). Many in the church were essentially approving of an immoral relationship (1 Corinthians 5:1-2). Paul commanded them to expel the wicked man from the church (1 Corinthians 5:13). The Corinthian believers were taking each other to court (1 Corinthians 6:1-2). Paul taught the Corinthians that it would be better to be taken advantage of than to damage their Christian testimony (1 Corinthians 6:3-8).
Paul gave the Corinthian church instructions on marriage and celibacy (chapter 7), food sacrificed to idols (chapters 8 and 10), Christian freedom (chapter 9), the veiling of women (1 Corinthians 11:1-16), the Lord’s Supper (1 Corinthians 11:17-34), spiritual gifts (chapters 12-14), and the resurrection (chapter 15). Paul organized the book of 1 Corinthians by answering questions the Corinthian believers had asked him and by responding to improper conduct and erroneous beliefs they had accepted.
(Note: Description used with permission from www.gotquestions.org)